hi
i have nokia n70 in pakistan.it does not work in pakistan.when i insert sim card ,i receive a message that it is not a valid sim card.i have refreshed it too,but yet does not work.some expert says that it required country code,while nokia care line says that it is third generation mobile it need advance sim.when i contact my service providers they answered that we have nothing anything like advance sim.
please solve my problem.

Hi,

First off it sounds like your phone is locked to another countries phone provider. the only way to unlock the phone is to find the service provider and ask them for the unlock code. This is the only way to unlock it, beware of people selling codes, they have a high fail rate and waste your money.