If you see a feature discussed in these help articles that isn't on your device, keep in mind the following:

• Some older devices do not support all requirements the application demands.
• Some regions might not have a feature for various reasons—for example, because the data that the feature needs is not available or hasn't been generated for that region.

If you're looking for Yahoo! Address Book, it's not in this version as such, but its addresses are available to you when you compose an email.

Also note that Yahoo! Messenger isn't a part of this version.