I was told I could buy a crappy phone off of eBay and start a new line and pay around ten bux a month and use the new line to get my iPhone 5 and then switch my current number to the new iPhone. I am not eligible to upgrade my 4s until June. The problem is I don't need another line. I don't want to pay 649 retail though. Do a lot of people do this? Around how much would the ETF be when I shut the new line off?