I use this phone now for 3 months, so had to test it enough time. I'm ready also quite happy with it. Everything works perfectly so far. What bothers me only that the battery is flat relatively quickly if, for example how many SMSs I wrote. Which of course is not just good for a phone that was designed according to the manufacturer specifically for "prolific writer". Moreover, I find the battery indicator fairly inaccurate and unreliable. (Alone also because only divided into 3 bars) My old phone warned example already almost a day before the battery was empty with beeps, so that they had enough time to recharge. When KS360, sadly, that only about 1 hour before the battery is empty, a notice comes. If you miss this, the device is switched off simply without any warning and it is no longer accessible. This could have been done better really.