Smartphonethoughts.com reviews this Windows Mobile based Smartphone:

"I'm currently using a Tanager which uses the ARM OMAP 710 processor running at about 130MHz. So you could say that I'm used to waiting a little when working on my phone. In picking up the 8390, I saw a huge difference in speed. The Intel X-Scale processor running at 200MHz gives the phone a very nice speed boost. All the menus appeared promptly and applications seemed to open with ease. On the odd occasion, I would noticed that the phone appeared very sluggish. However, once I launched the task manager that came bundled with the phone, and shut down any application that was still running in the background, everything would be fine."