How does one use a 5-inch phone one-handed? My thumbs aren't large enough to hit the extremes of a 5-inch screen. (fully-grown American of European descent with a height exactly at the center of the bell curve)
Swype style keyboards work wonders. Double tap + drag to zoom.
I have smallish hands and it's just not that big a deal to be honest. My last phone was iphone sized and I wouldn't go back to that size for just about anything.