hi there, i'm new in this part of the web.i just got a lg optimus t from a friend, and wanted to use it with a different cell phone provider, but since day one. it did not let me do an software update, it was running 2.1 so i hooked it up to my pc and did the update. still has the no service, no sim card. rooted with z4root, then unrooted. I was told i bricked it, redid the lg mobile software update, did it, now i do not even have the apn t-mobile. And still have the no service no signal. what do i do? thanks in advance.