how to unlock the lock of a k7770i Sony Ericsson?

I forgot the lock code of my phone and now can not unlock it, because I'm using a different sim i put my old one and it works resettingg tried it .. Is there any way I can just go through this?

If the phone is asking for a Phone Lock Code, the code is 0000. If you changed it and forgot the code, it would have to be sent to the service to be restored, as there is a master code. The rest of your question makes it appear that the subsidy lock on the phone. If you take your SIM card from another phone and put it in your K770i and K770i his "Insert correct SIM", then it means that the phone is locked to the original service provider you bought your phone. To unlock it, you need to contact the original service provider and ask for NCK or subsidy unlock code. We provider does this in Sony Ericsson, because that are not contractually obliged to give the code to consumers as part of the agreement we made with the provider-of-service-Martha Sony Ericsson Team Answers

Sony Ericsson K800 Firmware Update


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