Before contacting the after-sales service, perform the following simple checks.
They may save you the time and expense of an unnecessary service call.
When you switch your phone on, the following messages appear
Insert SIM Card
Check that the SIM card is correctly installed.
Phone Locked
The automatic locking function has been enabled. You must enter the
phone's password before you can use the phone.
Enter PIN
You are using your phone for the first time. You must enter the Personal
Identification Number supplied with the SIM card.
The option requiring that the PIN be entered each time the phone is switched
on was enabled. You must enter your PIN and then disable this option if so
required.
Enter PUK
The PIN code was entered wrongly three times in succession and the SIM
card is now blocked. Enter the PUK supplied by your network operator.

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