Incorrect Sim Indicated - Sony XPERIA ST27i Troubleshooting Manual

Problem Areas: SIM
5. Insert this SIM drawer assembly into its connector.
6. Replace board.

1.30.3 Incorrect SIM indicated

Check:
Check whether the phone is locked to a particular operator
and whether the correct operator SIM is being used.
Action:
1. Use a proper operator SIM or test SIM.
2. Replace board.
1265-6294 Rev 4
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