I have the Galaxy S4 for T-Mobile. Model: SGH-M919.
So my phone worked great for awhile (I bought it almost brand new from a 3rd party for $350) but then the next thing I knew it gave me an error message saying "SIM card not inserted" or something very similar. Anyways, got a new SIM card, no worky , my old SIM works in other phones. Did a master reset, didn't fix the issue.
My SD card which is inserted into the same part as the SIM card gets inserted into works just fine. So I replaced the entire SIM reader and SD reader part with a brand new OEM part. Still nothing. Now i'm wondering if there is a software or some other fix for this issue.
P.S. I really don't want to pay Samsung $650 for a phone. I just want mine fixed.