What is "2.5G" wireless technology? How does it relate to J2ME?
Created May 7, 2012
Bill Day Cellular phone technologies have evolved in several
major phases, denoted by "Generations", or "G" for
short.
One of the most widely discussed and important 2.5G technologies
is GPRS, designed to be layered on top of
existing 2G GSM networks. Please visit the related FAQ entries on 1G,
2G, and
3G technologies for more information on the history and
future of cellular technology.
"2.5G" is an acronym which represents various technology upgrades for existing second generation cellular networks.
2.5G upgrade technologies are designed to be overlayed on top of 2G networks with minimal additional infrastructure. 2.5G technologies are packet based (as opposed to 2G technologies' circuit based, voice centric approach), and as such allow "always on" connectivity (no modem connection delays).