I want a new iPhone 3GS, but I been hearing from a few people online that it's not good when it comes to bars and data. They been saying that it drops from 5 bars to only 1 bar and from 3G then drops to Edge . Is this really a big problem for anyone on here? I looked at the AT&T 3g map and it tells me that their is 3G all over where I live so I shouldn't have any problems right?