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 was originally standardized by European Telecommunications Standards Institute (ETSI) in response to the earlier CDPD and i-mode packet-switched cellular technologies.It is now maintained by the 3rd Generation Partnership Project (3GPP).
Sometimes billing time is broken down to every third of a minute.
Usage above the bundle cap is charged per megabyte, speed limited, or disallowed.
GPRS is a best-effort service, implying variable throughput and latency that depend on the number of other users sharing the service concurrently, as opposed to circuit switching, where a certain quality of service (Qo S) is guaranteed during the connection.
In 2G systems, GPRS provides data rates of 56–114 kbit/second.
The GPRS core network 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.GPRS extends the GSM Packet circuit switched data capabilities and makes the following services possible: If SMS over GPRS is used, an SMS transmission speed of about 30 SMS messages per minute may be achieved.This is much faster than using the ordinary SMS over GSM, whose SMS transmission speed is about 6 to 10 SMS messages per minute.GPRS supports the following protocols: When TCP/IP is used, each phone can have one or more IP addresses allocated. Devices supporting GPRS are divided into three classes: Can be connected to GPRS service and GSM service (voice, SMS), but using only one or the other at a given time.GPRS will store and forward the IP packets to the phone even during handover. During GSM service (voice call or SMS), GPRS service is suspended, and then resumed automatically after the GSM service (voice call or SMS) has concluded. A true Class A device may be required to transmit on two different frequencies at the same time, and thus will need two radios.To get around this expensive requirement, a GPRS mobile may implement the dual transfer mode (DTM) feature.