I'm upgrading my piece of crap Droid to an iPhone 4s on March 3rd...FINALLY ALMOST HERE! I was doing some grocery shopping and while walking out noticed that Walmart had the iPhone 4 and 4s on display. I wanted to play around with it and then I noticed that it aid $88 for the 4 and $188 for the 4s. My question...would there be anything negative about going through Walmart instead of Verizon or Apple? I've only ever gone through Verizon in the past so I didn't know if it would really mean anything in terms of the warrenty or anything.