How to reset UL3-BT (2nd Gen)/UL3-BT / UL3 to factory default?
For RESET, all information on the lock will be deleted.
Step 1. Remove the battery cover.
Step 2. Find a small paper clip and stick one end into the reset button hole.
Step 3. Press and hold the reset button at least for 5 seconds until a beep is audible. The lock's display will show "No User".
Step 4. If you are using U-tec App, you need to delete the lock in the App. U-tec App > UL3 > Settings > Advanced > Delete.