Edge Gprs Gsm

Quick GSM Overview - Layman Term Answers Of Common GSM Questions

Though it has has been used for some time, not everyone knows the real definition of what GSM is, and what it is doing for us.  Let’s see if we can get an answer of this in layman terms that will be rather simple for most to understand. First:  What does the GSM acronym stand for? When first created, GSM stood for Groupe Special Mobile, over time however the definition was decided to be altered to mean Global System for Mobile communications.  The group who came to the choice to do this, and who also promotes this cellular standard, is known as the GSM Association. Second: What exactly is the purpose behind GSM? It permits mobile phones to make connections with the varied services that we need (phone calls, messaging, internet, and so forth.). Third:  How is GSM able to do this? The correct of defining GSM should be as a cellular network, meaning people's phones will attempt to connect to networks by finding cells in the nearby close vicinity. The channels that are in use for speech and signaling are digital instead of analog, which is the reason why the phrase 2G or 2G network came into being. Fourth:  Which frequencies does GSM use? GSM primarily has use of four different bands. These four are in the 850, 900, 1800, and 1900MHz frequency range. The 900 and the 1800MHz bands are used by many regions all over the world, whereas the 850MHz and the 1900MHz bands are mostly in use within the US, as well as Canada, and areas in South America. Fifth: What are the major upgrades that GSM has put into effect? General Packet Radio Service (aka GPRS) and Enhanced Data Rates for GSM Evolution (aka EDGE) were two releases originally used to beef up GSM services, with an emphasis on its accessing the internet capabilities.  The GSM 2G cellular systems in combination with GPRS often are termed 2.5G (since it is a half step up from 2G), but EDGE is an add on to GSM that is considered to be 3G communication technology (and is often referred to as 2.75G because it mixes the previous gen GSM 2G with the more current 3G tech). Sixth: Is the modern 3G capable of being run with the GSM frequencies? It was decided that the 3G network would include GSM (the 850MHz, 900MHz, 1800MHz, and 1900MHz frequencies) combined with 2100MHz UMTS.  3G having been given the ability to use the those GSM frequencies is considered a well thought out idea being as it since it lowers the fees to the network due to using GSM's lower frequency bands. Seventh:  What is the GSM network's present state? At present, mobile phones throughout the world are very likely using GSM (with 2 billion users in over 212 countries daily on it). Eighth:  What is the reason for the popularity of GSM worldwide? When it originally came out, users flocked to GSM because of its better digital voice quality that it was able to offer combined with it being the 1st service to be capable of having cheaper alternatives than only making calls with a user's phone (the best known being Short Message Service (aka SMS)). Network suppliers decided to use GSM mostly due to equipment being easy to deploy. Ninth:  Why  does GSM continue to be the world's 1st choice? Ubiquity all over the world for GSM has let network carriers offer roaming services, meaning that a network user will be able to use their phones from GSM carriers in numerous countries.  None of the different bands are even near to having the capability of matching the GSM frequency's area of coverage.

Though it has has been used for some time, not everyone knows the real definition of what GSM is, and what it is doing for us.  Let’s see if we can get an answer of this in layman terms that will be rather simple for most to understand.

First:  What does the GSM acronym stand for?

When first created, GSM stood for Groupe Special Mobile, over time however the definition was decided to be altered to mean Global System for Mobile communications.  The group who came to the choice to do this, and who also promotes this cellular standard, is known as the GSM Association.

Second: What exactly is the purpose behind GSM?

It permits mobile phones to make connections with the varied services that we need (phone calls, messaging, internet, and so forth.).

Third:  How is GSM able to do this?

The correct of defining GSM should be as a cellular network, meaning people's phones will attempt to connect to networks by finding cells in the nearby close vicinity. The channels that are in use for speech and signaling are digital instead of analog, which is the reason why the phrase 2G or 2G network came into being.

Fourth:  Which frequencies does GSM use?

GSM primarily has use of four different bands. These four are in the 850, 900, 1800, and 1900MHz frequency range. The 900 and the 1800MHz bands are used by many regions all over the world, whereas the 850MHz and the 1900MHz bands are mostly in use within the US, as well as Canada, and areas in South America.

Fifth: What are the major upgrades that GSM has put into effect?

General Packet Radio Service (aka GPRS) and Enhanced Data Rates for GSM Evolution (aka EDGE) were two releases originally used to beef up GSM services, with an emphasis on its accessing the internet capabilities.  The GSM 2G cellular systems in combination with GPRS often are termed 2.5G (since it is a half step up from 2G), but EDGE is an add on to GSM that is considered to be 3G communication technology (and is often referred to as 2.75G because it mixes the previous gen GSM 2G with the more current 3G tech).

Sixth: Is the modern 3G capable of being run with the GSM frequencies?

It was decided that the 3G network would include GSM (the 850MHz, 900MHz, 1800MHz, and 1900MHz frequencies) combined with 2100MHz UMTS.  3G having been given the ability to use the those GSM frequencies is considered a well thought out idea being as it since it lowers the fees to the network due to using GSM's lower frequency bands.

Seventh:  What is the GSM network's present state?

At present, mobile phones throughout the world are very likely using GSM (with 2 billion users in over 212 countries daily on it).

Eighth:  What is the reason for the popularity of GSM worldwide?

When it originally came out, users flocked to GSM because of its better digital voice quality that it was able to offer

combined with it being the 1st service to be capable of having cheaper alternatives than only making calls with a user's phone (the best known being Short Message Service (aka SMS)). Network suppliers decided to use GSM mostly due to equipment being easy to deploy.

Ninth:  Why  does GSM continue to be the world's 1st choice?

Ubiquity all over the world for GSM has let network carriers offer roaming services, meaning that a network user will be able to use their phones from GSM carriers in numerous countries.  None of the different bands are even near to having the capability of matching the GSM frequency's area of coverage.

About the Author

Gregory Mulford is the marketing director of Quad-Band-Phones, the online portal for Shenzhen CE IT Ltd.
Please follow this link to see some quad band phones with dual SIM that are sure to work anywhere GSM is used.
QBP.

GSM, GPRS and EDGE Performance $140 GSM, GPRS and EDGE Performance - Second Edition provides a complete overview of the entire GSM system. GSM (Global System for Mobile Communications) is the digital transmission technique widely adopted in Europe and supported in North America.  It features comprehensive descriptions of GSM’s main evolutionary milestones - GPRS, (General Packet Radio Services) is a packet-based wireless communication service that promises data rates from 56 up to 114 Kbps and continuous connection to the Internet for mobile phone and computer users. AMR and EDGE (Enhanced Data GSM Environment), and such developments have now positioned GERAN (GSM/EDGE Radio Access Network) as a full 3G radio standard.  The radio network performance and capabilities of GSM, GPRS, AMR and EDGE solutions are studied in-depth by using revealing simulations and field trials. Cellular operators must now roll out new 3G technologies capable of delivering wireless Internet based multimedia services in a competitive and cost-effective way and this volume, divided into three parts, helps to explain how: 1. Provides an introduction to the complete evolution of GSM towards a radio access network that efficiently supports UMTS services (GERAN). 2. Features a comprehensive study of system performance with simulations and field trials. Covers all the major features such as basic GSM, GPRS, EDGE and AMR and the full capability of the GERAN radio interface for 3G service support is envisaged. 3. Discusses different 3G radio technologies and the position of GERAN within such technologies.  Featuring fully revised and updated chapters throughout, the second edition contains  90 pages of new material and features the following new sections, enabling this reference to remain as a leading text in the area: Expanded material on GPRS Includes IMS architecture (Rel’5) and GERAN (Rel’6) features Presents field trial results for AMR and narrowband  Provides EGPRS deployment guidelines Features a new chapter on Service Performance An invaluable reference for Engineering Professionals, Research and Development Engineers, Business Development Managers, Technical Managers and Technical Specialists working for cellular operators

USB GSM/GPRS/EDGE Wireless Modem Adapter with Antenna $34.9 - This is a quad-band wide area wireless modem supporting all the different frequencies used by EDGE and GSM, GPRS networks worldwide. Users around the globe can enjoy the freedom to have access to critical information wherever they are located on both EDGE and GSM, GPRS networks.- Supports GSM, GPRS, EDGE 850, 900, 1800, 1900MHz- Speed rates: EDGE: 460.8Kbps, 123.7Kbps(DL, UL); GPRS:(CS4)85.6Kbps, 42.8Kbps(DL, UL); GPRS:(CS2)53.6Kbps, 26.8Kbps(DL, UL); GSM:9.6Kbps, 14.4Kbps(DL, UL)- EDGE multi-slot class 12 (up to 4TX, 4RX, 5 totals)- Browses Internet with high speed- File transmission- Receives and sends E-mail- Receives and sends short message (SMS)- Express Card interface, hot plugging and hot pull out- Support windows 2000, 2003, XP, Vista, Server 2008 operation system- External removable antenna- Package includes: 1*GSM, GPRS, EDGE USB Wireless Modem, 1*2.5mm earphone, 1*Installation CDSpecificationsDimensions: 4.02 in x 1.54 in x 0.51 inWeight: 5.68 oz

GPRS Networks $140 GPRS is a packet based wireless communication service that offers data rates from 9.05 up to 171.2 Kbps and continuous connection to the Internet for mobile phone and computer users. GPRS is based on GSM communications and complements existing services such as circuit switched cellular phone connections and the Short Message Service (SMS). GPRS represents the bridge between 2G and 3G mobile telecommunications and is commonly referred to as 2.5G. Implementation of GPRS requires modification of the existing GSM networks in that GSM is a circuit switched technology while GPRS is packet oriented. GPRS enables packet data (the same as is used by an Ethernet LAN, WAN or the Internet) to be sent to and from a mobile station - e.g. mobile phone, PDA or Laptop. WAP and SMS can also be sent using GPRS and individuals working with GPRS need to learn and understand how the mobile stations, the air interface, network architecture, protocol structures and signalling procedures must be modified. GPRS offers much higher data rates than GSM and can be combined with 3G technologies such as EDGE to give even higher bit-rates. It offers many benefits for customers and network operators: such as volume (rather then time) dependent billing and more efficient use of network resources. Due to the worldwide delay in implementing 3G solutions such as CDMA and UMTS the demand for GPRS is still growing. GPRS Networks : Offers detailed information ranging from standards to practical implementation Answers 'how' and 'why' rather than just simply re-stating GPRS specifications Provides comprehensive coverage in a single volume Essential reading for all telecommunications project managers, field engineers, technical staff in network operator and manufacturing organisations, GPRS application and service developers, Datacoms/IT engineers. The comprehensive coverage also makes this a superb reference for students of computer science, telecommunications and electrical engineering.

GPRS $99 This innovative new book explains how GPRS (general packet radio service) allows you to expand your GSM networks towards third generation mobile communications to meet the demands of the most-sophisticated mobile data applications. The book concentrates on the interfaces between the known GSM network elements and the new subsystems -- PCU, SGSN, and GGSN -- that come with GPRS. It offers you an in-depth explanation of the extensions and methods of the GSM air interface necessary for GPRS and shows how the channel-oriented GSM is linked to the packet switched GPRS. Moreover, it explains what extensions there are in channel coding, how resources are allocated on the air interface, and how the quick network access necessary for GPRS is made possible.

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GSM $130 With around 3 billion subscribers, GSM is the world's most commonly used technology for wireless communication. Providing an overview of the innovations that have fuelled this phenomena, GSM: Architecture, Protocols and Services, Third Edition offers a clear introduction to the field of cellular systems. Special emphasis is placed on system architecture and protocol aspects, and topics range from addressing concepts through mobility management to network management. This third edition contains around 25% new and reworked material and has been thoroughly updated to encompass recent advances and future trends. It serves as both an introductory textbook for graduate students as well as a reference resource for telecommunications engineers and researchers. This edition: Presents capacity enhancement methods like sectorization, the application of adaptive antennas for Spatial Filtering for Interference Reduction (SFIR) and Space Division Multiple Access (SDMA) Provides a detailed introduction to GPRS, HSCSD, and EDGE for packet-switched services and higher data rates Features updated coverage on the vastly expanded range of GSM services, including an examination of Multimedia Messaging Service (MMS) Adopts a highly graphical approach with numerous illustrations

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GSM, GPRS and EDGE Performance: Evolution Towards 3G/UMTS, 2nd Edition $132.49 No Synopsis Available

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Microcontroller Based GSM/Gprs Projects $151.35 A microcontroller is a singlechip computer. Before the invention of the microcontrollers most intelligent systems were designed using microprocessors. A microprocessor is the processing element of a computer, consisting of an Arithmetic and Logic Unit (ALU) and the Control Unit (CU). A microprocessor on its own is useless and it has to be supported by a large number of peripheral chips, such as memory, inputoutput, timer, interrupt logic and so on. Currently there are many microcontroller chips manufactured by various companies. This book is based on using the highly popular PIn6F887 type microcontroller. GSM/GPRS modems are used in all mobile phones. This book teaches the basic principles of microcontrollers and shows how they can be used in GSM/GPRS based communications projects. All of the examples and the projects in the book are based on the highly popular mikroC language, developed by mikroElektronika. Author: Ibrahim, Dogan/ Ibrahim, Ahmet Binding Type: Paperback Number of Pages: 204 Publication Date: 2010/06/07 Language: English Dimensions: 5.98 x 9.01 x 0.46 inches

GPRS in Practice $130 Professionals quickly discover that, although the technical specifications for GPRS cover all parts of the engineering functions in detail and depth, they are lacking in one important feature; the conceptual framework within which the specifications sit - GPRS in Practice fills this gap. By beginning with an explanation of why GPRS is necessary and describing the core concept of GPRS operations, the TBF (Temporary Block Flow), a revision section then covers the GSM Air Interface with its Radio, Physical and Logical channels and this progressively leads to the GPRS logical channels - what they do and how they do it. The book then moves on to a brief introduction of the GPRS protocol stack which provides a launch pad for a detailed trip into all the layers of this stack, with detailed diagrams and explanations of each layer integrated into an overall understanding of how the GPRS service operates in practice. Provides descriptions of why procedures are specified and then clearly explains how the specifications work in practice  Provides a layered view of the GPRS protocol and deals in detail with each layer separately  Includes numerous acronyms and abbreviations accompanied by their full meaning An invaluable resource for Mobile network operators, Development and deployment engineers and Handset designers.

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Radio Interface System Planning for GSM/Gprs/Umts $253.31 This broadly applicable book introduces radio system planning, emphasizing theoretical and practical details for the planning of GSM, GPRS and UMTS mobile networks. It explains the key planning parameters for these systems and describes the common tasks in radio system planning. Author: Lempiainen, Jukka/ Manninen, Matti/ Lempidinen, Jukka Binding Type: Hardcover Number of Pages: 292 Publication Date: 2001/10/01 Language: English Dimensions: 9.64 x 6.22 x 0.69 inches

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GSM/EDGE $120 With over four billion subscribers Worldwide, GSM/EDGE is by far the World's most successful communications technology of all time. Ubiquitous, deployed in every country of the World, except in Japan and South Korea, GSM/EDGE is the result of a continued evolution that has spanned over two decades. A leading team of experts from Nokia, Nokia Siemens Networks and Instituto Nokia de Tecnologia, guide you from the history of GSM standardization to the cutting-edge techniques in the latest 3GPP releases. Covering 3GPP Release 7 and Release 8, and addressing their motivation and detailing their concepts, this book also offers insights into further steps in evolution from Release 9 and beyond. GSM/EDGE: Evolution and Performance allows you to keep apace with all of the new developments that have occurred in 3GPP on the GSM standard since the introduction of EDGE: Covers all the key aspects of GSM/EDGE Evolution from Release 7 until Release 9 in a systematic manner. Features performance evaluations derived from leading-edge simulation tools and field trials. Addresses network optimization techniques and environmental aspects. Written by leading experts in the field of GSM/EDGE evolution and standardisation. Contributors from Nokia, NSN, Helsinki University of Technology and Instituto Nokia de Tecnologia.

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GPRS for Mobile Internet $99 A comprehensive presentation of GPRS (general packet radio service). After a general overview of the GSM (global system for mobile communication) and GPRS systems, the text provides detailed coverage of a wide range of critical topics, including the radio interface, user plane and RLC principles.

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Mini GSM/GPRS/GPS Car Tracking System $99.99 FeaturesSupport non-server based locationLocation memorizationAuto location reportAuthorize/delete the tracking phone numberCovert alert amp; voice surveillanceGeo-Fence: alert in case of breaching the predefined districtMovement alert: alert in case of movementSpeed alert: alert in case of excess of the predefinded speedPower alert: alert when device is being switched offSimply insert a GSM sim card into the GPS unit. Whenever you call the unit it will respond with the coordinates of its location thru a SMS message. You can then use these coordinates on any mapping software (for example google earth) which will show where exactly the unit is locatedWith some little setup, you can also have the device to send the data directly to a computer thru GPRS and display its location on a map with our bundled software for real-time location trackingSpecificationDimensions: 65mm x 46mm x 18mmBand: 850/ 900/1800/1900Mhz or 900/1800/1900MhzNetwork: GSM/GPRSGPS Chip: SIRF3 ChipGPS Sensitivity: -159dBmGPS accuracy: 5mWeight: 50gTime to First Fix: Cold status 45s, Warm status 35s,Hot status 1sCar Charge: 12-24V input, 5V outputWall Charger: 110-220V input, 5V outputBattery: Chargeable Changeable 3.7V, 1000mAh Li-ion batteryStandby Time: 48 hours

mini gsm / gprs / gps car tracking system $80.84 Caratteristiche sostenere non-server basati sulla localizzazione posizione memorizzazione auto posizione relazione autorizzare / eliminare il numero telefonico di inseguimento allarme e di sorveglianza segreta voce geo-fence: allarme in caso di violazione del distretto predefinito Movimento alert: alert in caso di movimento accelerare alert: alert in caso di eccesso della velocità predefinded Potenza alert: alert quando il dispositivo viene spento Basta inserire una scheda sim gsm nell'unità gps. ogni volta che si chiama l'unità risponderà con le coordinate della sua posizione attraverso un messaggio sms. è quindi possibile utilizzare queste coordinate su qualsiasi software di mappatura (ad esempio Google Earth) che mostrerà esattamente dove l'unità si trova con qualche piccola messa a punto, è anche possibile avere il dispositivo per inviare i dati direttamente ad un calcolatore attraverso gprs e visualizzare la sua posizione su una mappa con il nostro software in bundle per il monitoraggio in tempo reale posizione specificazione Dimensioni: 65mm x 46mm x 18mm band: 850 / 900/1800/1900MHz o 900/1800/1900MHz rete: GSM / GPRS gps chip: chip di SIRF3 gps sensibilità:-159dBm Esattezza di GPS: 5m peso: 50g volta al primo fix: 45s 35s stato freddo, caldo, caldo 1s stato auto di carica: 12-24V input, output 5v caricabatterie da muro: 110-220V input, output 5v batteria: variabile addebitabile 3.7V, 1000mAh Li-ion standby time: 48 ore

Mini GSM / GPRS / GPS-Auto-Tracking-System $80.84 Features unterstützen Nicht-Server-basierten Standort Lage Auswendiglernen Auto-Standort Bericht autorisieren / Löschen des Tracking-Telefonnummer verdeckte Überwachung Alarm Stimme Geo-Zaun: Alarm im Falle eines Eingriffs in die vordefinierten Bezirk Bewegung Alarm: Alarm bei Bewegung Speed ​​Alert: Warnung bei Überschreitung der Geschwindigkeit Vordefinierte Macht Alarm: alarmieren, wenn das Gerät wird abgeschaltet legen Sie einfach eine GSM-SIM-Karte in das GPS-Gerät. wann immer Sie das Gerät nennen es wird mit den Koordinaten seiner Position durch eine SMS-Nachricht zu reagieren. Sie können dann diese Koordinaten auf einer Mapping-Software (zB Google Earth), die zeigen, wo genau sich das Gerät befindet, wird mit einigen kleinen Setup können Sie auch über das Gerät, um die Daten direkt an einen Computer durch GPRS und zeigt ihre Position auf einer Karte mit unseren Software-Paket für Echtzeit-Standortbestimmung Spezifikation Abmessungen: 65mm x 46mm x 18mm Band: 850 / 900/1800/1900 MHz oder 900/1800/1900 MHz Netzwerk: GSM / GPRS GPS-Chip: Sirf3 Chip GPS-Empfindlichkeit: -159 dBm GPS-Genauigkeit: 5m Gewicht: 50g time to first fix: Kalter Status 45s, warmer Status 35s, heißer Status 1s Auto Gebühr: 12-24V Eingang, Ausgang 5V Ladegerät: 110-220V Eingang, Ausgang 5V Batterie: Anrechenbare veränderbare 3.7V, 1000mAh Li-Ion Akku Standby-Zeit: 48 Stunden

Scan2email Auf Einem GSM/Gprs Faxgert $106.74 In der heutigen Zeit und seiner globalen Wirtschaftsumgebung spielt die Erreichbarkeit eine relevante Rolle. Drahtlosnetzwerke wie GSM und GPRS erweitern die Mglichkeiten hin zum Ziel der grenzenlosen Erreichbarkeit. Dieses Buch beschreibt Design und Implementierung eines neuen Dienstes, der einen weiteren Schritt in Richtung uneingeschrnkter Erreichbarkeit bedeutet. Der Dienst trgt den Namen Scan2Email und wird auf einem Faxgert der Firma Sagem Communications Austria implementiert. Scan2Email beschreibt die bertragung eines eingescannten Dokuments an einen EMail Empfnger. Im Rahmen dieses Buches werden dazu relevante Technologien, Ablufe und Hardwarekomponenten erklrt. Zustzlich erfolgt durch die Beschreibung von Arbeitsablufen und Codeausschnitten eine Dokumentation fr die Umsetzung der Funktion Scan2Email. Am Ende des Werkes zeigt ein funktioneller Test die erfolgreiche Integration des Dienstes in das bereits bestehende Framework von Sagem Communications Austria. Author: Hdlmoser, Michael Binding Type: Paperback Number of Pages: 104 Publication Date: 2010/02/24 Language: German Dimensions: 5.98 x 9.01 x 0.24 inches

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Portable Mini GSM/GPRS/GPS Tracker for Personal Remote Positioning $80 - Built-in SIRF3 Chipset, excellent for fixing the position even at a weak signalstatus- Built-in GSM/GPRS module supports 4-frequency GSM 850/900/1800/1900 MHz- Gets the position information via mobile phone SMS, or examine the path on theInternet- SOS button send out exact location for immediate rescue/action- Working Based on GSM/GPRS network and Internet, this product can locate and monitorand remote targets by SMS or internet- Monitor and protect child, elder, disabled and can be used for physicaldistribution and inspect official occasions, track criminals secretly- Package includes:- 1 * GPS Tracker- 2 * 3.7V 1200mAh Li-ion rechargeable batteries- 1 * USB data and charging cable- 1 * 110V~240V US type AC adapter- 1 * Software CD- 1 * English user manualSpecificationsDimensions: 2.72 in x 1.85 in x 0.71 inWeight: 13.23 oz

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GPS + Dualband GSM/GPRS Realtime Anti-Theft Vehicle Tracker (900MHz/1800MHz) $89 - Build-in GPS and GSM/GPRS modules- Support GSM 900/1800 MHz. Excellent for fixing the position even at a weak signal status, work well even in areas with limited sky view like urban canyons- High sensitivity, JRC low power GPS chipset- SOS button send out exact location for immediate rescue/action- Support check location and real-time and historical trajectory by SMS or Internet- Support single location and continuous tracking- Support cut-off electricity and oil function and recovery command- GSM module: MTK program, GSM 900/1800 dual-band. Support the TCP protocol- GPS chipset: JRC chipset- Package included:- 1 * GPS tracker device- 1 * GPS and GSM antenna- 1 * SIM card socket- 1 * Power cable- 1 * 2.5mm to 3.5mm adapter cable- 1 * 3.5mm jack earphone- 1 * Software CD

Free shipping-New Fast Bulk SMS-GPRS Modem-GSM MODEM-USB Modem $15.68 Fast Bulk SMS-GPRS Modem-GSM Modem-USB Modem Frequency: 900/1800MHz High speed for 85.6Kbps supports sms,data,voice,dial-up

Sagem Puma GSM Smartphone (Unlocked) $102.99 "Key features of the Sagem Puma GSM Smartphone include integrated solar cell with charge indicator, vibrant 2.8-inch touch screen display with QVGA resolution and TFT wide-angle viewing, 3.2-megapixel camera with LED flash and 6x digital zoom, VGA video recording, built-in music player, open Internet browsing and more!This brand-new unlocked Sagem Puma is ready to use on networks supporting GSM/GPRS/EDGE 850/900/1800/1900 MHz and UMTS 900/2100 MHz frequencies.Integrated solar cell w/charge indicator2.8-inch touch screen (240 x 320 QVGA resolution)3.2-megapixel camera w/LED flash, 6x zoomVGA video recordingGPS, compass, geotagging, routing & mappingOpen Internet browsing, WAP pushHSPA & WCDMA/EDGE/GPRS/GSM connectivityBluetooth, USB 2.0Dimensions: 4.02 (H) x 2.20 (W) x 0.51 (D) in.Weight: 4.06 oz."

GPS/GSM/GPRS Tracker for Personal Remote Positioning $116.8 - Support 4-frequency GSM 850/900/1800/1900 MHZ- High sensitivity, new technology- Excellent for fixing the position even at a weak signal status- Work well even in areas with limited sky view like urban canyons- Compact size, and smaller than one name card for easy to hide- Very Low power consumption- Fast Signal Acquisition- Support single location and continuous tracking; location triggered by tracker; location triggered by authorized cell phone- External GSM and GPS cable style antennas- Comes with 3.5mm cable style microphone set- JD1914 plug relay holder included- 1 * connection cable included- English use manual includedSpecificationsDimensions: 3.74 in x 2.13 in x 1.02 inWeight: 21.52 oz

Handheld TriBand GSM/GPS/GPRS Remote Personal Position Tracker with SOS $100.97 - Built-in SIRF StarIII Chipset, excellent for fixing the position even at a weak signal status.- Built-in GSM/GPRS module, supports GSM 900/1800/1900 MHz- Sensitivity: -159dBm- Supports SMS communication or GPRS TCP connection.- Gets the position information via mobile phone SMS, or examine the path on the Internet- Voice surveillance- Add or change Username and Password and Authorized number- Monitoring and SOS feature.- Geofence alert when it breaches the restricted area.- Movement alert when it begins to move.- Overspeed alert when the target moves exceed of the restricted speed.- Low battery alert if the battery is low.- Package:- 1 x EU type power adapter- 1 x Strap- 1 x Battery- 1 x USB cable- 1 x Driver CD- 1 x English user manual?

V250 Ultra Mini Real-Time GSM/GPRS/GPS Tracker (900/1800MHz) $89.1 - Built-in SKYTRAQ high-performance single-chipset, support GPS rapid positioning capabilities- Excellent for fixing the position even at a weak signal status- Built-in GSM/GPRS module, support GSM 900/1800Mhz- Get the position information via mobile phone SMS or examine the path on the internet- Support SMS communication, GPRS TCP or UDP connection- Use SMS as the control command to change tracing function or switch GPS- Built-in quick dial and SOS buttons can instantly send current location (GPS coordinates) to designated receivers via SMS- Package included:- 1 * GPS tracker- 1 * 3.7V/450mAh Li-ion rechargeable batteries- 1 * USB cable- 1 * 110~250V AC charge adapter (EU plug)- 1 * Software CD- 1 * Neck loop strap

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