@charmander : Almost everyone who uses a smartphone nowadays uses Opera Mobile.
Firefox if you like plugins and skins – it’s also the only one I’ve come across that even has 3rd party support, let alone native, for blocking non-html content like Java, Flash, XSS, and the like.
Opera if you like an all-in-one that likes to tinker with its own native support
Flock if you like social sites.
Sleipnir if you like Norse themology.
If you want the browse rwith the most support though, IE 6,7, and 8 are still the most supported and widely used, and as Adecco just showed me, using a trident renderer (IE’s engine) in Firefox just doesn’t cut it