ok, so i have verizon, and i have wanted to get an iPhone since they came out. but i really don't want to pay $60 a month. but i did notice that existing AT&T customers only have to pay $20 a month. so i came up with an idea. my contract with verizon ends in march, so when it does, can i switch to AT&T, get a random phone, and then get an iPhone a month later and still pay $20 a month?