We don't have 4G where I live, but 35 minutes away they do. My battery life is much better than my Fascinate was on 3G or WiFi. I haven't been in the 4G area enough to compare, but it still does fine with battery. Not as good, but OK. As far as speed, 4G seems faster than what I get over WiFi at home. It spoils me to go down to where there is 4G and then come back here. I don't use my phone to download movies or surf much anyway, so 3G doesn't bother me a lot. Enjoy your phone. I think you'll like it.