Why is my Samsung Galaxy Duos not recognising SIM card?

Question

after completing a factory reset on this phone, it is showing "invalid IMEI" and can't recognise any SIM card

Answer 1

Hi is your samsung galaxy s duos mobile is not accepting your sim in it then this might happen if your phone is locked to some other network provider then it wont accept any other GSM sim until you unlock it ...You can easily unlock the phone through online providers like MobileUnlockSolutions.com here they are rendering network unlock code for all mobile models at reliable cost .You first check that whether the code is available for your country and network provider .If yes then pay for it and unlock the phone then freely use it with any GSM sim ...