I used it on Tmobile's network for about 16hrs without problem, then it suddenly started showing emergency calls only and asking to insert sim. I've place the tmobile sim in another phone and it worked fine, also put an unactivated AT&T sim in the S4 and it sees it. The phone is still booting up with the samsung custom screen. Any ideas on how to fix?
With Android L on the horizon, it’s no surprise that Google’s … more
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