The normal flow for this would be. Browser -> Email Message -> Inbox -> Email Message <<back>> Inbox -> Email Message <<back>> Inbox <<back>> First Email Messa

The normal flow for this would be. Browser -> Email Message -> Inbox -> Email Message <<back>> Inbox -> Email Message <<back>> Inbox <<back>> First Email Message <<back>> Browser You'd only be 3 back button presses to get to your browser session. Of course it's possible for users to create gigantic stacks of history where you wouldn't want to go all the way through them. If that's the case you can get back to your browser using the Multitasking UI or by going back to your home screen. I think most users use the back button frequently however. If you do, you're always only a few presses to be back to your original activity.