Yes it is possible.
The settings for different phones and networks vary.
Basically, you create a new DUN on the Axim and input the correct settings for your phone.
They are usually a phone number which looks like *99# and then an extra dialing string.
Your network provider should be able to give you this information.
You will need to pair the phone and the Ax.
When you get it right you just hit connect and the phone does it's thing.
By the way, no matter how good the phone connection is the download speeds will be quite slow.
You might find the correct settings in this
Sticky.