My iPhone 3GS doesn't read any sim card
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I have an iPhone 3GS 16GB white version. I placed the motherboard into another iPhone 3gs housing and still no sim reading. So i thought maybe it is the connection with the simreader. I replaced it by soldering on a new simreader. But still it keeps searching for a simcard. the metal pin goes down if i insert the simtray so that should be good i guess. Are there any other options that i can try to fix this simcard issue? (it does not work with any other simcard either.