The Touch HD more closely matches up to the iPhone 3G than other HTC smartphones because of its huge 3.8-inch screen, one of the biggest available on a smartphone, which has more responsive touch capabilities than the Touch Diamond or Touch Pro, which sport 2.8-inch screens. The has a 3.5-inch screen.

I was impressed by the Touch HD.

The sleek 3G (third generation mobile telecommunications) smartphone is probably the best hope for a Microsoft Windows Mobile OS handset that I've seen so far in the battle against Apple. The Touch HD has a Qualcomm 7201A microprocessor, the same as the Touch Diamond, and Microsoft Windows Mobile 6.1 operating system.

The Touch HD's huge touchscreen is what makes it a better rival to the iPhone 3G than other HTC products.

The Touch HD's screen is speedier, more responsive, and far larger than the Touch Diamond, without losing the Diamond's striking display quality. The Touch HD's screen has WVGA (widescreen video graphics array) 800 x 480 pixel resolution. The screen on the iPhone 3G, by comparison, is VGA 480 x 320 resolution.