Insert sim - Sony Ericsson Walkman® W880i Cellular Phone

"Insert SIM" message is normally displayed on phones when a SIM card is not inserted on power-on or it does not detect the SIM card inserted.

Likely Causes:

1. No SIM card inserted or inserted SIM card is damaged
2. Inserted SIM card not positioned well in such a way as to make contact with the corresponding contact bridges on phone.
3. Phone locked to a specific network and can only work on other networks when the firmware version is "flashed", that is completely changed to an unlocked version.
4. The phone might be faulty (try with another good SIM, if you still get thesame message and its not one of the above reasons... it might be a transciever problem or the phone's SIM card slot's pins might be defective).