HTC Mogul - Manual (Page 159)

Section 13: Managing Your Device 163
13.5 Checking System Information
If you want to find out about technical details of your device such as the type or speed of the processor, memory
size, etc., you can check under Settings for device information.
To find the operating system version number:

Tap Start > Settings > System tab > About.
The version of the operating system on your device is shown near the top of the About screen.
To get detailed device information:

Tap Start > Settings > System tab > About.