Question about Nokia C203
If your Nokia C2-03 phone displays an error message saying "Invalid Sim" then your phone is probably network locked.
You can unlock it easily by using an unlock code.You can get this code at reasonable cost from Unlocking4U.com with easy step by step unlocking instructions and unlock it.Then you can use freely any GSM network sim card.
Posted on Jan 03, 2014
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Posted on Jan 02, 2017
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