Cingular Wireless later offered CDPD under the Wireless Internet brand ( not to be confused with Wireless Internet Express, their brand for GPRS / EDGE data ).

Enhanced Data rates for GSM Evolution ( EDGE ) ( also known as Enhanced GPRS ( EGPRS ), or IMT Single Carrier ( IMT-SC ), or Enhanced Data rates for Global Evolution ) is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM.

Through the introduction of sophisticated methods of coding and transmitting data, EDGE delivers higher bit-rates per radio channel, resulting in a threefold increase in capacity and performance compared with an ordinary GSM / GPRS connection.

EDGE, like GPRS, uses a rate adaptation algorithm that adapts the modulation and coding scheme ( MCS ) according to the quality of the radio channel, and thus the bit rate and robustness of data transmission.

This was expanded over time to include data communications, first by circuit switched transport, then packet data transport via GPRS ( General Packet Radio Services ) and EDGE ( Enhanced Data rates for GSM Evolution or EGPRS ).

General packet radio service ( GPRS ) is a packet oriented mobile data service on the 2G and 3G cellular communication system's global system for mobile communications ( GSM ).

GPRS usage is typically charged based on volume of data transferred, contrasting with circuit switched data, which is usually billed per minute of connection time.

In 2G systems, GPRS provides data rates of 56 – 114 kbit / second.

GPRS extends the GSM Packet circuit switched data capabilities and makes the following services possible:

USB 3G / GPRS modems use a terminal-like interface over USB 1. 1, 2. 0 and later, data formats V. 42bis, and RFC 1144 and some models have connector for external antenna.

The SMS or GPRS data packets sent from UPSs trigger software to shutdown the PCs to reduce the load.

* GSM with the GPRS packet switched service combines FDD and FDMA with slotted Aloha for reservation inquiries, and a Dynamic TDMA scheme for transferring the actual data.

In 2009, the 3G coverage covers most major towns where there is a telephone exchange and either HSDPA or EDGE services within radius ( GSM UMTS maximum allowed range ) with GPRS as basic data coverage.

Enhanced Data rates for GSM Evolution ( EDGE ), Enhanced GPRS ( EGPRS ), or IMT Single Carrier ( IMT-SC ) is a backward-compatible digital mobile phone technology that allows improved data transmission rates, as an extension on top of standard GSM.

This makes HSCSD relatively expensive in many GSM networks and is one of the reasons that packet-switched general packet radio service ( GPRS ), which typically has lower pricing ( based on amount of data transferred rather than the duration of the connection ), has become more common than HSCSD.

Such data can be obtained via the CAN-bus, via direct connections to AVL systems or via open bus systems such as UFDEX that both sends and receives data via SMS or GPRS in pure ASCII text format.

GPRS and EDGE data services are also available.

* GPRS and EDGE data communication

It does this by carrying the subscriber's data from the subscriber's current serving GPRS support node ( SGSN ) to the GGSN which is handling the subscriber's session.

The GGSN converts the GPRS packets coming from the SGSN into the appropriate packet data protocol ( PDP ) format ( e. g., IP or X. 25 ) and sends them out on the corresponding packet data network.

If SMS over GPRS is used, an SMS transmission speed of about 30 SMS messages per minute may be achieved.

To get around this expensive requirement, a GPRS mobile may implement the dual transfer mode ( DTM ) feature.

Today, the term may refer not only to Frame Relay and Asynchronous Transfer Mode ( ATM ), both providing PVCs, but also to Internet Protocol ( IP ), GPRS, and other packet-switching techniques.

The terminal discovers its P-CSCF with either DHCP, or it may be configured ( e. g. during initial provisioning or via a 3GPP IMS Management Object ( MO )) or in the ISIM or assigned in the PDP Context ( in General Packet Radio Service ( GPRS )).

These may use either TMC, which delivers coded traffic information using radio RDS, or by GPRS / 3G data transmission via mobile phones.

It introduces a new technology not found in GPRS, Incremental Redundancy, which, instead of retransmitting disturbed packets, sends more redundancy information to be combined in the receiver.

; Class A: Can be connected to GPRS service and GSM service ( voice, SMS ), using both at the same time.

; Class B: Can be connected to GPRS service and GSM service ( voice, SMS ), but using only one or the other at a given time.

The upload and download speeds that can be achieved in GPRS depend on a number of factors such as:

To avoid the dependency on Ethernet infrastructure, the UPSs can be connected directly to main control server by using GSM / GPRS channel also.

A Nanosite can be easily downloaded to a mobile handset via WAP, GPRS, Wi-Fi or Bluetooth.

A GPRS connection which is common among GSM mobile phones can be used to share data globally.

* An Internet Service Provider which provides network access via common modem or modem-like devices ( be it PSTN, DSL, cable or GPRS / UMTS ) can have one or more NAS ( network access server ) devices which accept PPP, PPPoE or PPTP connections, checking credentials and recording accounting data via back-end RADIUS servers, and allowing users access through that connection.

Utilising a radio path ( GPRS / GSM ) as the primary signalling path is not only quicker than PSTN but also allows huge cost savings as unlimited amounts of data can be sent at no extra expense.

These advertisements would be downloaded via the device's GPRS data connection, and would be targeted based on data inputted to the device.

In the spirit of the GPRS specifications, there can be many implementations of SNDCP, supporting protocols such as X. 25.

On phones with built-in Wi-Fi ( tested on Nokia E51, E63, E66, E71, and N95 8GB ), the Nokia application does not allow a Wi-Fi access point to be used for the data connection, only GPRS access points are allowed, allowing the possibility of revenue sharing between Nokia, the Radio stations and GPRS network operators.

The rest of the country will be served by 2. 5G ( GPRS ; nationwide coverage ) which is progressively being upgraded to 2. 75G ( EDGE or E-GPRS ).

; Class C: Are connected to either GPRS service or GSM service ( voice, SMS ).

Unlike either the Palm i705 and the Palm VII ( which both could only make data connections over the Mobitex pager network ), downloads and uploads were done using comparatively-fast GPRS connections.

* The GPRS Core Network ( the optional part which allows packet based Internet connections ).

The GPRS system is an integrated part of the GSM network switching subsystem.

EDGE is standardized by 3GPP as part of the GSM family and it is an upgrade that provides a potential three-fold increase in capacity of GSM / GPRS networks.

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 IP packets to external networks such as the Internet.

The GPRS system is an integrated part of the GSM network switching subsystem.

This is part of layer 3 of a GPRS protocol specification.