Fix Network Problems In Samsung Galaxy S2 Korean Version

How do I fix no service/no signal problem. Did the phone relocked itself to its original provider?

Replaced charging port then started having very low reception/no service. replaced mic/speaker and antenna module still the same problem. refitted with the old parts and still the same!!!!!

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My SHV-E250S is showing registration fail?

I am using it in Dubai, my phone is showing registration fail & is not connecting to mobile data network

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More questions and answers on this topic can be found here: Samsung S2 GT-I9100 null IMEI and unable to restore original IMEI number in EFS

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