(K) is an ideal sport mobile: the size and good facilities make it an ideal companion for sporting activities. NFC, Bluetooth and GPS are 4 good prerequisite for coupling with Fitness wristbands or Smart Watches. First drawback: the phone is not communicating with the in-house Sony Smart belt. To this end, the memory is not enough. Many other apps and devices of Fremdherstetllern also work with the small built-in memory .... Sony locks himself out ie. Second, the GPS has a serious problem since Kitkat (s. Also forums on Kitkat Virtually killed my GPS ...) and the memory card inserted. It's not nice to be in the woods and can only use the stopwatch to be able to take the track to track or be guided. And the memory card is now time essential if you need maps. As the sport use was my main purpose, I am therefore very satisfied with the otherwise beautiful and well-equipped mobile phone. If there is a solution, I hope that Amazon finds them there, the phone has declined because of that defect.
