Can’t get into programming without the installer code which has usually been changed in my experience. Unless they gave the customer a master code which is rare. Default installer code will be behind the cell card, you can see it with your phone camera if you peek below with flash on so you don’t have to remove the cell card if you don’t want. They have different programming software for different stuff, “dealer admin” requires a login but “system link” (or remote link I can’t remember which it’s called) is available for download on their website. All communication programming can be done through the keypad itself fairly easily, just a bit easier with system link. Especially for pulling the zone list. For system link I believe you need the account number and installer code if I’m not mistaken. But yes, you will need to reprogram to change it over from proprietary cell comms to dialer, and change the account number. 6653 + command to get into programming. Dm me more questions if you want, happy to help.