Samsung Auto Blocker | Phonecheck Help Center
Operating system from One UI 6 (Android version 14) provides enhanced security through a feature called Auto Blocker
If you’re running a station with Phonecheck, and you keep getting stuck in AT Mode or “Authorization Issue,” this is often the culprit.
Reference: https://www.samsung.com/latin_en/support/mobile-devices/protect-your-galaxy-device-with-the-new-auto-blocker-feature/
Samsung devices (especially newer models) have a built-in security feature that can auto-block USB debugging requests under certain conditions. It’s part of Samsung Knox and One UI's tightened security to prevent unauthorized access.
Here’s a quick overview of how it works:
🔒 Auto-Blocker on Samsung USB Debugging – What It Does
-
Auto-blocks USB debugging access if:
-
The request comes from an untrusted or previously unauthorized PC.
-
The phone detects suspicious or rapid repeated connections.
-
There’s been no user interaction or authorization for a while.
-
-
This feature is usually toggled under:
-
Settings > Developer options > Auto-blocker -
Or via
Settings > Security and Privacy > Auto Blocker(varies by One UI version)
-
🛠️ Common Scenarios Where It Gets in the Way
-
Phonecheck or similar tools trying to automate ADB interactions.
-
Devices that restart during testing and try to reconnect without manual confirmation.
✅ How to Work Around It
-
Turn off Auto Blocker:
-
Go to Settings > Security and Privacy > Auto Blocker, and disable it.
-
Or, in Developer Options, disable the related toggle (depends on model and UI version).
-
-
Always allow from this computer: When prompted for USB Debugging, check the box.
-
Enable USB debugging in recovery or setup automation for large batches (if possible with Knox/MDM tools).