Follow these instructions to successfully update your firmware:
Before starting, please make sure your iOS is upgraded to 12.0.1 and that you're using Wi-Fi for a faster update.
STEP 1: Open Kevo App > Select the Lock
STEP 2: Touch “Update Lock” to start the Software Update
STEP 3: Press the “Program” button” in the back of the lock. NOTE: Might need to remove cover to access the “Program” button.
STEP 4: Wait for update. NOTE: Leave the phone next to the lock when the update starts
STEP 5: Lock Info > v1.5.37 will confirm successful update