February 1, 2015 Leave a comment
Last time, we started looking at the various phone standards, trying to avoide ending up in acronym hell. We got as far as GSM, CDMA, Edo, HSPA+ and roaming. This time we move on to 4G, LTE and into the future.
While GSM and CDMA work using radio waves in a ‘traditional’ fashion; 4G works by means of an Internet Protocol (IP) network. The radio signals have to be translated into data packets for use on the network. This includes voice calls which use voice-over-IP. The fail-over for 4G is to switch back to a 2G or 3G network to make voice calls. Read more of this post