iPhone 5 will be announced within a few hours, so here's the weigh-in on what to expect versus what's already out there. iPhone 4 was hugely popular, still sells and costs a bundle. But with the iPhone 5 launch, some of the iPhone 4 features won't seem as appealing because they will have been upgraded. A faster smartphone with more memory will always be just around the corner, and dual core and even quad-core phones are soon to be the norm. Those are good reasons to upgrade. Start the slideshow to see the top 10 reasons to upgrade to Apple's newest iPhone.

Memory Chip
Memory Chip Reuters
Iphone Smartphone Iphone Iphone