For many our our NB-IoT smartlocks you can still use your metal key to open the door. Alternatively, you can also use a friend or neighbor’s phone to download the app, use your login to the app to unlock your door, and then delete the app. You can also use the provided keycards, fobs, stickers and rings to unlock, which are programmed to work permanently and ongoing for your Narrowband Smartlock. If you want to make time limited keycards/key tokens, you can use the Digital Keys app.