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  2. Comparison of mobile phone standards - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_mobile_phone...

    The availability of Subscriber Identity Modules allows users to switch networks and handsets at will, aside from a subsidy lock. GSM covers virtually all parts of the world so international roaming is not a problem. The much bigger number of subscribers globally creates a better network effect for GSM handset makers, carriers and end users.

  3. Enhanced Data rates for GSM Evolution - Wikipedia

    en.wikipedia.org/wiki/Enhanced_Data_Rates_for...

    EDGE/EGPRS is implemented as a bolt-on enhancement for 2.5G GSM/GPRS networks, making it easier for existing GSM carriers to upgrade to it. EDGE is a superset to GPRS and can function on any network with GPRS deployed on it, provided the carrier implements the necessary upgrade. EDGE requires no hardware or software changes to be made in GSM ...

  4. Circuit Switched Data - Wikipedia

    en.wikipedia.org/wiki/Circuit_Switched_Data

    This is because the user of an HSCSD connection does not have to wait for permission from the network to send a packet. HSCSD is also an option in Enhanced Data Rates for GSM Evolution (EDGE) and Universal Mobile Telecommunications System (UMTS) systems where packet data transmission rates are much higher. In the UMTS system, the advantages of ...

  5. List of wireless network protocols - Wikipedia

    en.wikipedia.org/wiki/List_of_wireless_network...

    Typical 2G standards include GSM and IS-95 with extensions via GPRS, EDGE and 1xRTT, providing Internet access to users of originally voice centric 2G networks. Both EDGE and 1xRTT are 3G standards, as defined by the ITU, but are usually marketed as 2.9G due to their comparatively low speeds and high delays when compared to true 3G technologies.

  6. List of wireless network technologies - Wikipedia

    en.wikipedia.org/wiki/List_of_wireless_network...

    The methods of deployment of cellular networks is undetermined. An option is to install a 6G tower at every building. The second option would involve integrating the functions of a 6G tower into devices like smartphones, allowing these devices to create their own cell for other users. The commercial release date is estimated to be 2028~2030. [9]

  7. 3G - Wikipedia

    en.wikipedia.org/wiki/3G

    There are evolutionary standards (EDGE and CDMA) that are backward-compatible extensions to pre-existing 2G networks as well as revolutionary standards that require all-new network hardware and frequency allocations. The cell phones use UMTS in combination with 2G GSM standards and bandwidths, but do not support EDGE.

  8. GPRS core network - Wikipedia

    en.wikipedia.org/wiki/GPRS_core_network

    The GPRS core network is the central part of the general packet radio service (GPRS) which allows 2G, 3G and WCDMA mobile networks to transmit Internet Protocol (IP) packets to external networks such as the Internet. The GPRS system is an integrated part of the GSM network switching subsystem. The network provides mobility management, session ...

  9. BlackBerry Torch - Wikipedia

    en.wikipedia.org/wiki/BlackBerry_Torch

    Compatible Networks GSM/GPRS/EDGE: 850/900/1800/1900 MHz UMTS/HSPA: 2100/1900/850/800 MHz 2100 MHz 2100/1900/850/800 MHz or 2100/1700/900 MHz CDMA/EVDO — 800/1900 MHz — Operating system: BlackBerry OS 7 Battery: 1270 mAH Lithium-ion polymer battery 12.8 days standby 12.3 days standby 6.9 hours talk 5.9 hours talk

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