First of all, on the quality of the phone is nothing to complain about. An ideal, cost-effective smart phone for the beginners. I bought two for my sons. The devil is in the detail: Samsung supplies the phone with its own operating system, which turns out to be little customer-friendly. Because the mobile phone comes with games from Gameloft therefore, prove to be other than free. In the first three days - before I have such services when mobile phone providers can be blocked - went a whopping 25 EURO for so-called premium services plan. More than half of this cost went was my fault, as I tried to understand the comments of my youngest. How should then only a child guard against such a rip-off? I then contacted Samsung (via chat) and Just Checking whether the Games can not completely erase in order to avoid any future trouble. But that does not seem to be possible at the REX 80. Only newly installed can take off, but that does not in the original version supplied. Besides the fact that you should enter (my letter remained answerless) in the butt for cooperation with such a "seller" as Gameloft Samsung, it is incomprehensible why they should not be able to determine the selection of its programs itself.