: Power off the phone, then hold Volume Down + Home + Power buttons simultaneously. Press Volume Up to confirm and enter Download Mode.
: After the process finishes, perform a factory reset from the phone's settings menu to fully clear the old account data. Alternative Methods : Power off the phone, then hold Volume
: Once the phone reboots with the combination firmware, it should automatically enable ADB. A prompt may appear on the phone asking to "Always allow from this computer"; select OK . : Power off the phone