Hello, I am new to this site, new to Chevy (ex-FORD owner), new to Suburban and new to Onstar. I guess that qualifies me as an all around newbie. My question is related to the phone that works through the NAV system. There is a place in the address book to store phone numbers for each destination. I was playing around with it the other day and actually placed a call. My question is - how is this billed? Does the call go through Onstar? Is it possible to link this to my current cell phone (Verizon Wireless) or to make it work through its own cell plan? I would like to use the integrated calling features of the truck (no Bluetooth) but don't want to be charged an arm and a leg for my calls if they have to go through Onstar. Any ideas?