Hello! I havent owned a iphone in a really really long time. I think i had one of the first ones but have been a android user after that. I am a long distance runner and I do both ski and run one till two times a day. Often in cold confitions like -20 celsius / -4 fahrenheit. Ive been a owner of Samsung Galaxy s2, S3 and im now using the S4. This phone is not even the waterresistant model but just the normal one. Still, it has never failed me in any condition and none of my phones have ever been damaged because of humidity, snow, rain or my sweathy pockets. Since both my laptops are macs and because of the yosemite/ios integration I really want to do the transition. I have never considered the iphone untill it came with the 4.6" screen that im opting for. However.... I am very concerned about using the iphone in sweathy/cold conditions. I have many friends that own iphone 4 and 5 and the phones just turn off when we are out skiing because it cant handle the cold conditions.. that makes me think it wont stand up with much humidity either when I have it in my pocket out running. Ive been looking into some waterproof cases, but I dont know how much bulk they will add. I would like feedback from runners that use their phones in cold/hot/sweathy conditions and how they phones are holding up. Thank you.