All you have to do is root your phone,take a backup of your EFS folder, Click the unlock now option and your Samsung Galaxy phone is unlocked.
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How to unlock Samsung Galaxy S devices ?Samsung galaxy S series (S, S2, S3, S4 and S5 and S6) devices can be unlocked using S6 Unlocker. No need to wait for sim unlock codes for your phones.Why to unlock your Samsung phone ?Traveling : If you are travelling abroad and want to use a different sim card on galaxy phone and avoid huge roaming costs.Change your service provider : If you want to change your current carrier like ATT or T-mobile and switch to another carrier.Increase Resale value: An unlocked Samsung Galaxy phone will resell at a much higher value than a locked one. S6 Unlocker will remove this restriction for you allowing you to sim unlock your Samsung Galaxy S4, S2, S3, S and Note, Note 3, Note 2 device. The only way you can bypass this screen on your samsung galaxy s3, s4 is to provide an unlock code and remove the restriction. Other handsets may display different messages such as "Enter special code" or "Enter unlocking code,". On recent phone models running Android software, the phone will display a message saying “SIM network unlock PIN” or “Enter Network Lock Control Key” if network locked. You can sell your unlocked Samsung Galaxy S, S3, s4 and unlocked Samsung Galaxy Note series phones for a much higher price by boosting its resale value.What is "sim network unlock pin" ?A locked Samsung Galaxy s6 will display a message if a restricted SIM is used, requesting the unlock code. Send us a screen shot of your device still in locked state and we will refund your money instantly!!S6 Unlocker is the only app ever which can unlock Samsung Galaxy phones permanently and securely. Both the money is fully refundable.Get unlocked or get refunded. But dont worry the maximum cost for sim unlocking your phone will be under $10 !!!.
PLEASE NOTE : There is an in-app purchase which is necessary for unlock code.