Here are the OFFICIAL manuals of the four very popular Windows Mobile devices: X1, Diamond, Pro and TYTN II. I’ve uploaded them on rapidshare as-well-as filefactory.
So, if are unable understand the basics of these devices, these manuals would be extremely helpful to you.
1) Sony Ericsson X1:
2) HTC TOUCH Diamond:
3) HTC TOUCH Pro:
4) HTC TYTN II: