Where can you find the restriction code for a cell phone?

Restriction Code

If this is regarding a cellphone then the restriction code is only available from your service provider.If it is T-Mobile they may give you the code if you have had service for more than 6 months and you request the code. Advise them you are travelling abroad and wish to use a foreign SIM card. If it is Cingular then you will need to be a bit more persuasive. There are other unlock options for most phones though!