Network Operators - HTC T-Mobile G2 User Manual

Settings
Access Point Names
Opens the APNs screen, where you can select mobile access point
configurations; or press Menu to add a new APN. Consult your carrier
about how to use the tools on this screen.
Use only 2G networks
Check to obtain slightly better battery life, by preventing your phone
from connecting to higher-speed networks. See "To limit your data
connection to 2G networks" on page 68.

Network operators

Opens a screen that searches for and displays mobile networks that
are compatible with your phone. Consult your carrier to understand
the billing implications of selecting another carrier.
T-Mobile G2
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User's Guide