Ditto....just put in a card and sim not affected.....maybe the sim is bad or does it work when you take the memory out
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The SIM works perfectly fine without the SD card in, just when an SD card is in is when the SIM isn't detected.
I had the same problem. Went to a Sprint store and they tried swapping the SIM/microSD card tray with one from the demo phone and it worked. The guy said it looks like the tray was bent a little. So I'm now the proud owner of a demo phone tray and my phone is perfect!