why screen show this?

[ryodumas]

I already insert my simcard which from umobile, it's work perfectly.

I do not know what the reason, the screen show "No SIM card"

I hope Sony will notice about this and solve this problem.

Thank you very much.

Model Number: C2105

Android Version: 4.1.2

Build Number:15.0.A.1.36

[nsaravanas]

Dual SIM mobile?

[AlvinZahran98]

Me too, I Have that problem, when I restart the phone, then my phone shows " TELKOMSEL | No SIM Card ", but it only lasts at a minute or two, then it gone...