att s3 on tmobile - slow data
Recently bought AT&T SIII (unlocked) for my girlfriend. She is on tmobile and she started complaining about very slow internet. I confirmed it via speedtest, we were getting way less than 1mbps, so definitely not a 3G speed.
it is not a coverage issue
it is not a bad sim card issue
We went to tmobile office and tried another sim card, no luck. It couldn't even find the network at all. With the original sim card it could take 10min to get the network. Then we put at&t sim card, got the network but it was just as slow as tmobile's.
So, I am assuming the phone has dead/damaged/disabled antenna. Any other thoughts? Is it fixable? (i'm pretty good at soldering)
Everything stock. 4.3. APN settings are OK. (slow internet was from the very first time she started using the phone, it took her 2 weeks to realize that something is not right.)