Anyone had problems with the screen lock/open switch on right side of the device. Mine is jamming sometimes so I need to use force and slide it down with nail and then it might jam at the bottom position. Sometimes it works like it should. No any force needed. No idea what is jamming the switch and I didn't find any dissamble pics so I could not study the mechanics of the switch. I assume there is no way to fix it by myself. And the ******* official repair/ warranty service here is so slow it takes atleast 2 weeks or more to get it fixed.