I have had my phone for a couple weeks now. The first few days I had it it would automatically switch from 3G to 4G whenever I drove through the Greater Hartford area. It has not done it since. The only way I can get it into 4G is to put it into Airplane Mode then take it out then it immediately goes into 4G. It gladly goes back to 3G once i'm out of Hartford but it will not go back into 4G unless I do the Aiplane thing every time. What gives? Thanks.