Question

My phone connects to either E, 3G, H or H+, what do they mean?

Answer 1

E stands for EDGE, you will be able to download to a  236 kbps speed

3G is an improved level, granting you a speed of 386kbps

H is associated with a 3.2Mbps speed, while H+ with  7.2Mbps, those features being practically unavabile for old phones

Answer 2

And if you ever have a 4G handset you will start noticing it saying 4G, which as far as I know is the quickest current technology