I think we all can agree: However easy or hard it is to get around a phone's software features is just as crucial as its hardware frame. Over the past year, we've covered six mobile operating systems: Android, iOS, Windows Phone 7, BlackBerry OS 6, Symbian 3, and the forthcoming webOS 2.0. Judging the designs of these interfaces is subjective, so you may not agree with all our points if your phone runs on one of these platforms, but we CNET mobile editors align our views on the following 10 smartphone "skins." 1. iOS 4 Like: It's almost difficult to recall the days before Apple's iPhone shattered the norm of the shrunken desktop UI (adopted by many a smartphone OS) with its elegantly simple design. Since then, the iPhone 4 has beautifully carried on the tradition of finger-friendly icons on a series of swipable screens with some useful enhancements like a pop-under multitasking bar and folders for grouping similar apps. Rearranging icons can still ...