I am getting my Droid today and trying to decide if I should send my friends and family my new GV number. My question is, if you use GV to send and receive calls, it would seem that mobile to mobile calls becomes irrelevant. I assume this would mean I must have a calling plan with free outside networks calls. It amazes me that I would actually have to spend more money to use GV, but it is what it is I guess. Please tell me if I am misinformed. Also how often does the GV routing number change? I suppose I could offset the costs of a higher plan by using GV for sms, but that option seems like a mess right now. Thanks.