$540 via promo credit when you add a new smartphone line with your own 4G/5G smartphone on postpaid Unlimited Plus plan between 5/18/23 - 5/31/23 & port-in req'd. Promo credit applied over 36 months; promo credits end if eligibility requirements are no longer met.
Try Dialing your own telephone number and pressing "*" when the recording starts.
The default passcode may be the last 4 digits of youyr phone number.
This differs by area, but in my area I can also dial (Area Code)1st 3 of Phone Number-9477, then enter my passcode.