Hello, my previous Galaxy S2 totally dead recently so I have had my eyes on Q10 with nice looking and awesome physical qwerty keyboard. I sticked with android phones for years and am used to the way they works. My question is whether the mapping system as good with Q10? I need great mapping and travel apps for oversea travel, and Ive read someone recommend an extended battery of mpj, any user could tell me whether this gained a lot of weight?? Any reply would be really appreciated!Thank you!