[Reference] Samsung SGH-A237 - Network Lock Done

[SimplyBest2]

Model: Samsung SGH-A237
Problem: Network Lock to ATT
done via Z3x Pro

Procedure:
1st. Phone must be totally powered off.
2nd. Open Samsung Pro. choose the correct model and select.
3rd. Goto Unlock Tab and click the unlock button (follow instruction)
4rth. Insert the uart cable to phone and turn on then it will proceed to TAT mode.
5th wait to finish and you're done.

UNLOCK INSTRUCTIONS:
Phone must be powered off!
1. Select correct COM port in 'Port' options.
2. Select connection mode in options ('Flash Mode' or 'TAT Mode') .
3. Press 'Unlock' for direct unlock.
4. Press 'Read Codes' to read security codes.
5. - Flash Mode:
Connect the phone to selected port with UART cable and press 'Power' button shortly,
or just insert cable to phone if you are using auto-ignition cable .
(If you have connection problem, try to push 'Power' button while loader will be sent.)
- TAT Mode:
Connect the phone to selected port with UART cable and press 'Power' button about 3 seconds,
or just insert cable to phone if you are using auto-ignition cable .

Operation: Unlock
Selected model: SGH-A237
Selected port: COM33 Z3X BOX Serial Port, 460800
Software version: 28.2

Connect phone and press power button... Phone detected
Switching phone to TAT mode... Ok
Reading phone info... Ok
Phone version: A237UCIF1
IMEI: 35862503107784
Phone SN: RPWSB38688
Reading security... Ok
Unlocking... Ok
Rebooting phone... Ok
Unlock done

Done with Samsung Tool PRO v.28.2