I have updated my T Mobile Samsung Galaxy J7 phone from Android 6.0.1 Marshmallow to Android 7.1.1 Nougat.
After restarting the phone, I got the message that "Your phone has been flashed with unauthorized software and is locked". What should I do?
After restarting the phone, I got the message that "Your phone has been flashed with unauthorized software and is locked". What should I do?