Samsung Sky Pro j727vl U4 unlock solution without credit free for our dear all members.
1 Power off your Samsung phone.
2 Enter your mobile in downloading mode.
To enter download mode, following these steps:
1 Power off your Samsung phone, press and hold Volume Down, Home and Power keys at the same time.
2 Release all three buttons when Samsung phone reboot and you see a warning sign.
3 Press Volume Up to enter the main screen of Recovery. Flash with our unlock modem file. open Nv Item write.And select comport.after select comport write nv unlock data and restart your phone unlock done.