Sm-t377w unlock only downgrade modem [Solution inside]
 

UNLOCK INSTRUCTIONS:
To unlock NEW security type:
Phone must be rooted!
If the software can't root the phone automatically,
then you must root your device manually.
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone' to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Unlock' button and select 'New Unlock' for direct unlock.

To unlock OLD security type:
1. Power on the phone.
2. Connect the phone to PC with USB cable.
3. Check Samsung modem in device manager, install drivers if needed.
4. Press 'Unlock' button and select 'Unlock' for direct unlock.

To read security codes (all security types):
1. Power on the phone.
2. Connect the phone to PC with USB cable.
3. Check Samsung modem in device manager, install drivers if needed.
4. Press 'Read codes' button to read security codes.

To reset Google account activation or Samsung reactivation lock:
1. ADB must be activated in any way (you can flash sBoot from combination firmware,
make sure, that you are not upgrade sBoot).
2. Connect the phone to PC with USB cable, install drivers if needed.
3. Select device in ADB settings.
4. Press 'Reset FRP/React/EE' to deactivate Google/Samsung/EE account activation lock.
(Sometimes needs to perform 'wipe data/factory reset' once more, to complete this locks removal.)

Operation: Unlock
Selected model: SM-J120W
Software version: 29.2

Searching Samsung modem... detected COM711
Reading phone info... OK
Model: SM-T377W
AP version: T377WVLU2API2
CSC version: T377WOYA2API2
CP version: T377WVLU2API1
Product code: SM-T377WZKAXAC
Phone SN: R52HA1J2E5M
Unique number: CAJ030D47438BA3
Reading IMEI... OK
IMEI: 358510070603572 (SIGN: OK)
Reading data from phone... OK
Unlocking... OK
Rebooting phone... OK
Unlock done

Done with Samsung Tool PRO v.29.2

Please uplod downgrade modem
Thanks

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