If i'm not mistaken, iphone users can go to the prev page by swiping right. 
-
-
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
-
-
My lazy fingers thank you.
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
-
-
I don't think too many people even use the phone with just one hand. And if they want to there are gestures to enable one handed use in most phone's software and UI.
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.