I haven't noticed this in forums and wasn't told by delivery folks. I feels it very important to share ... At delivery, your phone will pair to the car, and it seems having the phone is sufficient for using the car. After a few hours, the phone app will stop working (when attempting to log in, it will say " no product registered to this account "). The credentials still works on tesla website, but you just can't log into Tesla app (and therefore suddenly lose the capability to operate / monitor the car ! ) I called customer service and they told me the app will resume working only after 1-2 business days when all the paperwork finishes.