One is mobile-to-mobile phone calls, which I'll only use it for just a dollar a day for when I use it. But the sad fact is that I'll have to pay $15 for minimum if I were to use it for 30 days. I really want to pay only $5 or $10 depending on how much I use it. I really don't like to have airtime expired at the end of 30 days if I pay $15 a month. Of course, I don't have to pay monthly, but if I only use $5 out of $15 that I pay and I don't use the phone after 30 days and I have $10 left, that $10 will be gone. If I need to check my voicemail, I'll have to pay 10 cents per minute even when I'm in the Verizon network. My family is with Verizon Wireless, which gives me advantage of having mobile-to-mobile unlimited minutes. But I have to pay $1 for 24 hours to use it.

I'm sorry but I'm cheap! I pay $1.95 a month for my CallCentric 407 phone number, 2 cents a minute if I make a phone call, and 1.5 cents a minute if I receive a phone call. Thus, I pay $1.95 a month if I don't make/receive phone calls and up to about $3 to $5 a month if I do, depending on how much I make.
I really want to get myself a Windows Phone 7 phone when it comes out, but I don't want a voice plan. I cannot justify having either 200 minutes or 450 minutes for whatever the price I pay. But then I'll be stuck with paying Verizon's $55 a month for a smartphone data plan (feature phone data plan is $35 a month).