I currently have a Sprint family plan. One of the lines on a plan is a basic phone and therefore doesn't require the monthly data fee. I bought the S4 through Costco online due to their waived activation fee and free accessory pack. I upgraded this line so I could give my friend the S4 for his birthday that is coming up. I'll still be using the basic phone on that line so it's not like I'm cancelling service. I just wanted to take advantage of the upgrade. So my question is, am I going to have any issues (i.e. monthly data charge showing up each month, ETF)? I've done something like this through best buy before without issue.