I have the phone for about 8 months. At first I thought it was great, because it worked. A month ago, the problems started. The smartphone began to constantly reboot by itself. This is evident, for example, when you have to enter a PIN for the SIM card. You can tell even if you want to call and the device will restart at once, etc. This makes Reboot device sometimes 10 times per hour. As still warranty on the device, I have submitted it. The service center wrote that I should do regular restarts (which I do regularly aware and the device does, as described above, sometimes 10 x per hour on its own). The Smartphon was then transferred from the service center in the Ausliefrungszustand back and it was a software update performed. This software updates I'll also regularly gravel. OK, the smartphone comb relatively quickly from the "workshop" back. I then installed just the essentials again. Apps actually retrieve only the e-mail and receive, Google (search) us nothing else. No music, no pictures, no other apps. It was 18 days good, then was again not so funny. The constant up and started driving down wieder.Ich have of course checked that the memory is not full and that's the Sofware date. Theoretically, everything was fine. Practical is the Smartühone unusable. I have now complained again and send the Smartphone again. I simply assume that the smartphone is scrap and therefore do not recommend it more.