Which do you prefer? Great if you also make a short post explaining the reasoning behind your preference, and mentioning which handset you use (use the most - as many here own several smartphones). Please note that this poll is regarding phones only. I have omitted tablets as one handed use doesn't really play into the back button placement for them. I also decided to split each answer into phablet/smaller phone categories to clarify how much the preference for back button placement has to do with screen/device size categories. Please also mention if you're left handed! I left that out in order to not have too many options.