My S4, i9505, pops up an error every now and then. It says "Unable to register simcard on network. Reboot now. When I reboot everything is fine, but it happens perhaps three or four times a day. There is no pattern to it, and I have ordered a new sim. After installing that the problem still happes.
The phone is out of warranty so I looking at options.
I see that the simcard/sd-reader is very simple to replace.
Do you agree with me that the simcardreader is probably to blame? What else could it be?