just got a google voice number, switch providers?

[ucpro]

i just got my google voice number with the idialer and icontacts on my touch pro. i have verizon with my wife on a family plan with the friends and family plan with my google voice number in it so it'll all be free. since i figured this out, i'm thinking about switchin to tmobile since they're about 100 dollars cheaper for the same thing. i can put my google voice number in the fav 5 or whatever it is, then that way i wouldn't be losing minutes no matter who calls me.

the problem is that nobody that we know has tmobile, or the google voice access, just verizon or sprint so it would end up costing them money. should i be stingy, and keep everything free for me by costing the people i talk to minutes, or should i not

btw, i really want an android phone, and don't really trust motorola, which is why i choose tmobile