Global PC vendor Acer made its first move into the smartphones market at Mobile World Congress in Barcelona last month. The handsets are all courtesy of a company called E-Ten Information Systems that Acer bought last year. The company originally designed GPS devices, which you'll find on nearly all of their smartphones, and expanded into smartphones a few years ago with Microsoft's Windows Mobile OS.

The Acer M900 stands out from the rest of the pack almost immediately with its 3.8in touchscreens, among the biggest we've handled.

The Acer M900 is armed with a slide-out QWERTY keyboard that makes it a little bulkier than other smartphones. It's aimed at business users.

The nice thing about the 3.8in screen on the Acer M900 is the sharp picture quality. The resolution is 800x480, which is the same as High Tech Computer (HTC)'s Touch Diamond2 and Touch Pro2, and better than the 480x320 resolution on the iPhone 3G.

That's a good thing, too, because you need a big screen with good picture quality for the Acer Shell user interface (UI). The M900 has the same software as the Acer F900.

Acer F900 and M900