I have 2002 Scenic Cruiser and it has two phone jacks that I know off. One is in the invertor/charger compartment and there is one inside on the passenger side right next to the hot water heater electric switch. Right next to the refrigerator. I have only used it one time where the campground had a phone jack to hook up, but you don't see that much anymore with cell phones available everywhere. Hope this will help you find the inside phone jack.
