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either ask the mobile shoppee for the manual of the phone or download from the net. You will get the phone code in the manual. you have another choice reset the firmware of the phone.

Thanks! Chow!

Most new Sony will ask for the unlock code when you put a sim in it wont yet accept because it is locked.

When you receive your unlock code(s) they will look similar to the example below:

Your unlock code is :

CCK: 260704XXXXXXXXXX
NCK: 221877XXXXXXXXXX
NSCK: 40710XXXXXXXXXX
SPCK: 34120XXXXXXXXXX

The letters CCK, NCK, NSCK, SPCK indicate which code to use the different locks on your handset.

So you need to find out which lock is active on the handset ( But usually you'll only need the one marked NCK).

To do this you need to look in a secret menu on the phone

Tap the following in as if you were dialing a number to make phone a call...

*#*#7378423#*#*
A new hidden menu will appear.
Tap on service info
Tap on SIM lock

If you have Network 5 - this means your phone needs the net NCK Code
If you have Service provider 5 - this means your phone needs the SPCK Code