Here's the one thing I know about my next phone: It must, and I mean must, have a removable back cover with access to the battery. I love Windows Phone and it is the smoothest most problem free OS next to iOS but every once in a while(about once or twice a year in my case) the OS will freeze your phone. This has happened with my HTC Titan, Nokia Lumia 920, and my newly purchased Nokia Lumia 1020. This is not a fun experience at all. The phone becomes unresponsive and amazingly goes into some kind of super battery saving mode in which the battery inexplicably lasts for hours before it dies.(as opposed to the battery constantly draining while in use even with the screen cut off) The one thing I loved about the HTC Titan though is that I could easily take the back cover off and remove the battery skipping the whole waiting process. I believe even the latest, most high tech phone regardless of OS has problems from time to time for any number of reasons. And that's one credit I have to give to Samsung. They give their users everything they want in a phone with slightly less premium designs(and for the record, their phones are very nice in the hand in my opinion) in hardware. Everything else is there though. Great camera. SD expansion. Powerful processors. Removable battery. Excellent battery life. Powerful, crisp speakers. As much as I love my Lumia 1020, my next flagship Windows Phone will have to have those same qualities and Nokia has delivered on all except excellent battery life(not counting the 1520) and removable battery(not counting the lower end devices).