Handspring Treo 300 - Manual (Page 214)

Section 7
206 Setting Preferences for Your Phone
2. Deselect the Mobile IP check box.
Defining the IP address in a Simple IP service template
Everyone who logs on to the Internet needs to have a unique identifier
(an IP address), whether permanent or temporary. Some networks
dynamically assign a temporary IP address when clients log in. The IP
Address field lets you identify whether your network provides automatic
(dynamic) temporary IP addressing.
Note: Most networks automatically assign IP addresses. Leave the
Automatic IP Address option checked unless you are certain you need to
manually enter IP address information.
To identify dynamic IP addressing:
1. Tap Advanced.
2. Tap the IP Address check box to select it.
Deselect check box
Tap to select
automatic IP
address