Smart Phone That Can't Phone

My Problem

My Galaxy S3 would intermittently (once or twice a day) lose the cell signal.

My Fix

Being optimistic, I ordered your tools and tried to find the problem. I opened the phone and removed the first inner plate, and the shield on the SIM card fell out into my hand!

I wedged it back into its clips, put the screws back in, and the phone has worked ever since!

My Advice

Don't be afraid to open a modern device. Sometimes it is not working for a trivial reason!