I think we'd all agree that the default Windows Mobile contacts book is a little primitive compared with those you'll see on other mobile platforms.
That's why it's a good idea to install a third party address book application onto your Pocket PC as soon as you get it out of the box. Inesoft proves to be one of the best options you'll encounter, offering a wonderful environment for storing and managing your contacts.
The sheer depth of this software is difficult to convey in a short review, but needless to say this is a very powerful utility. When you launch Inesoft Address Book you're presented with a gorgeous user interface comprising of an ABC keypad with quick access to contacts via a T9 system. Alternatively, there's a small search bar at the top, or you can view contacts by category. There's a colourful menu bar with History, Dialer and Favorites options.
You could probably spend all day exploring the program's menus, and it boasts settings for contact-specific ringtones, filtering options, beaming contacts, making appointments, and much more. What's more, the New Contact option lets you enter all manner of information about a person such as their email address, IM details, multiple phone numbers and family details.
If you want a comprehensive contacts manager for your Pocket PC you'll be hard-pressed to find anything better than Inesoft Address Book.