Would I upgrade out of cycle if I had the iPhone 4S? No.
Specs in a nutshell: Weight: 112 grams (20 percent lighter than 4s)
Thickness: 7.6 mm (18 percent thinner)
Screen: 4-inch display (up from 3.5 inches), 1136x640 pixel resolution (up from 960x640), a fifth row of icons on the screen, 44 percent more color saturation
Connectivity: LTE network compatible, available on Verizon/Sprint/ATT
Processor: new A6 chip (processor and graphics are 2x faster).
Battery: 8 hours talk time, 8 hours browsing, 10 hours wifi browsing, 10 hours video, 40 hours music, 225 hours standby.
Camera: 8 mp, 3264x2448 resolution, f/2.4 aperture, 25% smaller, improved low-light quality, panorama feature, 1080p HD video, front-facing Facetime camera updated (720p) and face detection, improved mics and speakers.
- Good review and advice on Yahoo!