Appartanaya like, depending on the screen
Well, let's say, hardware and software, as well as all in the computer. Actually, it all depends on the screen of the controller; but even if the controller supports multi-touch, it must then be relevant BrAZ to implement the system and applications (such as HTC TouchHD2 device screen supports multi-touch and operating system - WindowsMobile - not, so multitouch originally worked only part of the HTC apps). According to the assurances of HTC, Desire is not initially quite correct screen controller; in the last OTA-an update of the software part to squeeze everything, but the problem has not disappeared, since the roots of her hardware.