Hi guys i have been reading many post from people who reboot their phones once 4G fades away and never comes back so i just wanted to provide a small tip which has been pretty useful to me and it's as simple as toggling in and out of airplane mode this will force the phone to search for the best connection available; this allows me to regain my 4G connection 80% of the time. This is a pretty simple tip that i have noticed many people dont know about so i hope it helps.