I'm not familiar with the Infuse, but I'll tell you what we're doing. I'm going to get an iPhone for my wife who now has a Samsung Impression. I won't buy a v4 since the v5 is just around the corner. In addition, if the v5 doesn't have a slide out keyboard, I'll be buying my wife an add-on slide out keyboard since her nails don't allow her to text on a virtual keyboard. Plus, there are so many accessories and apps made for the iPhone that no other phone can match. Do get the Apple Protection package though. I've used mine a lot of the last two years with my 3GS. Worth the money and peace of mind.