2.75G is a term occasionally used to refer to EDGE
data connectivity, implying that is is faster than
GPRS (sometimes called 2.5G), but slower than
typical 3G networks. The truth of the matter,
however, is that EDGE is an official ITU ratified 3G
technology. Typical EDGE implementations
generally do not obtain 3G data rates, though,
leading people to call it 2.75G.
4G is the term used to refer to the next wave of
as yet unknown mobile technologies that will be
used to replace current 3G networks. It is
expected that WiMAX will be one of the favored
4G technologies.
Also known as: "fourth generation"