Hello everyone,
Many Samsung users face the issue where dialing *#0*# does not open the Test Mode / Diagnostic Menu.
I recently discovered the cause:
The Auto Blocker feature in Samsung settings is blocking the code.
Fix Method:
Here’s the full step-by-step video guide:
This method is tested on multiple Samsung devices (S Series, A Series, Note, Z Flip/Fold, etc.) and works perfectly without root or extra tools.
If this fix works for you, kindly reply with your Samsung model—it may help others.
Thanks,
*~AM~*
Many Samsung users face the issue where dialing *#0*# does not open the Test Mode / Diagnostic Menu.
I recently discovered the cause:
The Auto Blocker feature in Samsung settings is blocking the code.

- Go to Settings > Security & Privacy > Auto Blocker
- Turn Off Auto Blocker
- Dial *#0*# → Test Mode will now open successfully.
- If you turn Auto Blocker ON again, the code will stop working.
Here’s the full step-by-step video guide:
This method is tested on multiple Samsung devices (S Series, A Series, Note, Z Flip/Fold, etc.) and works perfectly without root or extra tools.
If this fix works for you, kindly reply with your Samsung model—it may help others.
Thanks,
*~AM~*