While I’ve not been the biggest advocate of the new iPad, even though I complained about it, purchased it, returned it, and then bought it back, I’m not as hesitant to upgrade to the new iPhone. That’s because there are a number of features that make the iPhone a necessary upgrade. Last time I didn’t upgraded to the 3GS but with more processing power and a number of other features, I’ll be making the jump. Below are the top 5 reasons I’ll buy the upgraded version.