Roaming - The ability to use your cellular phone outside your usual service area – when traveling outside of the "home" service area defined by a service provider. Higher per-minute rates are usually charged for calls made or received while roaming. Long distance rates and a daily access fee may also apply.
Push SMS - The ability to request services (e.g. ringtones or games) from a wireless handset via sending a preset SMS code to a predetermined number. The service requested is sent back to the handset via SMS.
Global System for Mobile Communications (GSM) - GSM is a digital cellular phone technology based on TDMA that is the predominant system Europe, the Middle East, Africa, Asia and in parts of America and Canada. First introduced in 1991, the GSM standard has been deployed at three different frequency bands: 900 MHz, 1800 MHz and 1900 MHz. GSM 1900 is primarily deployed in North America. Named after its frequency band around 900 MHz, GSM-900 has provided the basis for several other networks using GSM technology. GSM uses narrowband TDMA which allows eight simultaneous calls on the same radio frequency. Along with CDMA and TDMA it represents the second generation of wireless networks.
Bluetooth - Wireless personal area network (PAN) standard that enables data connections between electronic devices such as desktop computers, wireless phones, electronic organizers and printers in the 2.4 GHz range at 720kbps within a 30-foot range. Bluetooth depends on mobile devices equipped with a chip for sending and receiving information.
Code Division Multiple Access (CDMA) - An air interface technology that was developed by the U.S. military and commercialized by the U.S. company Qualcomm. CDMA assigns a code to all speech bits, sends a scrambled transmission of the encoded speech over the air and reassembles the speech to its original form at the other end. CDMA supports SMS with a message length of 120 characters. With CDMA, each conversation is digitized and then tagged with a code. The mobile phone receives a signal to locate that particular code and it then deciphers the conversation off the airwaves. It codes each conversation expanding it 128 times, making it easy to decipher at the receiving end.
(Enhanced Data rates for Global Evolution - or GSM Evolution) A 2.5G high-speed digital data service provided by cellular carriers worldwide that use the GSM technology, including AT&T (formerly Cingular) and T-Mobile in the U.S. Also called Enhanced GPRS (EGPRS), EDGE works on EDGE cellphones as well as laptops and portable devices that have EDGE modems. Superseding the GPRS data service, EDGE users have typically experienced downstream data rates up to 200 Kbps
(General Packet Radio Service) The first high-speed digital data service provided by cellular carriers that used the GSM technology. GPRS added a packet-switched channel to GSM, which uses dedicated, circuit-switched channels for voice conversations.
GPRS works on GPRS cellphones as well as laptops and portable devices that have GPRS modems. Users have typically experienced downstream data rates up to 80 Kbps. GPRS is not the same as GSM's short messaging service (GSM-SMS), which is limited to messages of 160 bytes in length. GPRS was superseded by EDGE, which changed the modulation method to increase speed.