First the positives about this smartphone: The unit makes a solid and well-made impression. The keys respond well, the display is bright outside, the volume outdoor enough. The operation is quite nimble. The The battery lasts about three to five days with me. If you hold the part in hand, one has the impression, falls from a greater height above is without prejudice to it, like a dip in the water. I tested not however. Unfortunately, I will have to return the phone after about three weeks now. The reason defür is that I the telephone also to navigate, both in the car (with NAVIGON), and wants to use outside with OsmAnd. The device, which I had received was ausgetattet with 2GB ROM. (Now the devices are equipped with 4GB, but more on that later). I had used a 32GB memory card. Unfortunately, Android 4.4 is the ability to install applications on the SD card locked. I had therefore written in joyful hope for help au a message of support Catphones. When I got no response after three days, I called them, they told me that the problem would be handled. After another week I phoned again, I just wanted to know if I could count on a solution to the problem or whether I should return the unit to Amazon, because I can so do not use. You told me once that the problem would be resolved shortly. After about another week I have to return the device now, unfortunately, I will just use not only to make phone calls and surf the device. I have again researched, now the device with 4GB of ROM are ausgetattet, which 1.6 GB are available for free. For navigation that is not much, but if need be sufficient. Now I fear that in an eventual update of available free space is still low and I do not have enough memory available for user programs with 4GB. What bothers me, is the service of Catphones who tell me that they would take care of my problem. If the solution but is such that I would have to buy a new phone, I feel that as a bad business practice.