Simcard change only after restore
Have an Iphone 4 16GB which is and was neverlocked.
The phone has some issues with reading the Simcard..
When I restore my phone and activate it (with an AT&T simcard) it workes fine.....(if I want to change the simcard it says sim error, sim not valid)
If I restore it though, and I activate it afterwards with a t-mobile simcard it works fine with the tmobile card, but NOT with the AT&T simcard anymore...
any idea what the problem is here?
it's pretty weird