I bought the Smaprtphone about 1 month ago. So far I'm very happy with it. It reacts very quickly. Multitasking is (as promised) possible and the operation very easy. The front camera makes blurry images, so not so hot. Operation with the buttons at the back is used to, but once you get the hang of, really funny and easier than on the sides. But you should definitely buy a protective sheath, since the device in terms of its own accord when it is placed z. B. on the table. This is because the buttons are back. Once you lay it, it's like the Anschaltknopf operate and the device turns on. With a plain plastic sleeve to handle the problem very easily. The Knock Code is a great thing addictive. You get used to it so much that you do it with other devices unconsciously. Super that a Quick Remote Control App is also pre-loaded on the device. Too bad that there is no front LED light. Means if you erhällt alerts, you do not get a flashing light signal as usual from other smartphones.