Zte N800 User Manual page 177

System Updates
From time to time, updates may become available for your
phone. You can download and apply the following updates.

Update PRL: Download and update the PRL (preferred
roaming list).

Update Profile: Update your online user profile information.
NOTE: If your data services or account syncing ever seems
to go out unexpectedly, use this feature to reconnect with
the network.

Update ZTE Software: Update the Android Operating
System (OS) on your phone via an over-the-air connection.

Update Firmware: Update your phone firmware. You may
be required to power your phone off and back on to
complete the upgrade.
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