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If your Nokia C7 phone displays an error message saying "Insert Sim (or) Sim card not valid" then your phone is probably network locked. To unlock it,visit the site OnlineGSMunlock.com here they are providing the unlock code at reasonable cost with easy step by step unlocking instructions and unlock it.Then you can use freely any GSM network Sim card.
The Nokia C7 have several issues with the factory installed SIM card reader. Problem can be solved by replacing SIM card reader. Either find your nearest cell phone repair store or buy your own online and replace it yourself.
What is your mobile model?Have you tried the mobile with other Indian sim cards?If you still get the same error then I think your phone is locked with a Saudi Arabian network.You need to unlock it...otherwise it wouldn't accept other networks.You can approach third party unlocking services like Unlock-zone.com and by specifying the mobile make,model,country and network to which the mobile is locked to you will be able to get the unlock service along with free unlock instructions.Once unlocked you will be able to use the phone with Indian sim cards. If the phone works with other Indian simcards without unlocking then may be there is a problem with the sim card that you are using now.Approach the network provider and get a new sim.
The PUK code, (Personal unblocking Code) is used when you enter in a PIN wrong too many times. Not sure why you would need a PUK for inserting a indian SIM card. regardless the PUK code should be entered in when the AT&T SIM is inserted in the phone and asking you for the PUK. Also PUK's can change, you may need to call and get a more current one
Hello! I have similar situation with mobile. As a gift I resieved Sagem my W-8 from Italy. I insert ukrainian card n it write "sim is noy allowed".What to do?If u can please help me!
MY MOBILE IMEI NO:356794001608577.
PLEASE SEND ME THE UNLOCK CODE ON MY E-mail adress:Svit_sv79@mail.ru.
thank U before