A friend updated to 40 th firmware. Now do not work the buttons at the bottom of the screen, which open the address book and a numbers panel set, although when you click on them, they are enlightened, as usually happens when you press, and even the phone to vibrate. This shows that, with the calibration of the screen all right. It is desktop mode, in which the top displaying icons quickly launch applications. Pictures these icons are not visible, but if you try to click on them (on an empty black spot), the square button is dimmed (as usual when you press), but the program just will not open. They did collect on the factory settings, overloaded telephone, did not help. Address Book menu opens. Toggle the desktop to the core and the panel contacts. Lower button still does not work, but the panel contacts working buttons with icons of contacts. Does anyone know what the problem is and how to solve? Sam is afraid to update the firmware.