What is "2.5G" wireless technology? How does it relate to J2ME?
"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).