For Master PIN, it can be changed on the igloohome app under the Lock Info page. As this is done over Bluetooth, you have to be within Bluetooth range to change the Master PIN.
For Duration and Permanent PINs, the PIN can be changed to a 4-9 digit PIN of your (or your guest's) choice by:
1. Key Current PIN followed by # on the lock to activate the PIN. If this PIN has been used before, you may skip this step.
2. Enter *1 0 #<Current PIN>#<New 4-9 Digit PIN>#<New 4-9 Digit PIN># on the keypad of igloohome lock, following which, a long beep from the lock will indicate that the PIN has been successfully changed.
3. Perform Bluetooth unlock, then refresh the app page, the PIN will be updated and appear accordingly.