People say ohhh the galaxy s2 and the motorola droid razr are thinner then the iphone 4 and 4s, well no s*** there thinner its because the phones are alot bigger and longer, so more room to put hardware in there, but if they tried to make a smartphone with all those specs in the form factor of a iphone 4s, they wouldnt be able too, as for apple they can cram all that in this form factor, (A5, 8 megapixel camera and sensor, front camera, 64gb capacity etc) in my book i think the iphone is the thinnest for its size and will be for a long time.