My thunderbolt has problems having a constant data connection. This usually occurs when I connect to wifi, then when I turn off wifi, 4g logo comes on then after maybe 5 seconds...no data connection. It's not 4g then to 3g-->1x but from 4g to no data. Then comes back on sporatically and turns off. Anyone experiencing the same issues? Is it my phone or software problem? When i go on facebook or google play it works fine for like 8 seconds then "connection error." Then after a few seconds back to normal. This is pretty frustrating...I live in watsonville, CA btw which has strong 4g reception. PLEASE SHED SOME LIGHT!