SIM card connection lost

[Jay Jay]

I had a similar issue and "fixed" it by making a shim out of a small piece of flexible plastic cut from a milk bottle and inserted between the SIM card and the metal frame of the holder. Works great, have not had a problem with the SIM not being detected since doing that. (The problem may have to do with variations in SIM thickness. I never had that issue with the Tracfone SIM I used initially for test purposes, it started with my AT&T SIM.)

I tried taking a photo, it's not very good but you can just about make out the translucent plastic shim in this photo.

Thanks Zebulon, will try your "solution", interesting indeed!