[DarthKarl]

I have the verizon/onstar plan. It works great and it is a whole lot cheaper than using those pre-paid minutes from onstar.

I was lucky enough to already have my wireless plan through verizon. Basically all that happens is the onstar phone is added as an additional line onto your existing plan (I think the current cost is 9 or 10 bucks more a month). Nearly all of your current verizon plan features attach to the new line (of course there is no txt messaging and I think call waiting doesn't work) Then you get a new phone number from verizon and thereafter the in-car phone works like it always has, but your plan time shows up as part of your verizon minutes.

For me it has been great. Before, I rarely used the onstar phone. Now whenever I'm in the Hummer, it is the primary cell phone I use.