Using the RTM-800078
Network Service
Tap Tools on the Command Bar and select Options..., Network Service...
The network service setting deals with the selection of network. You can
let the RTM-8000 select a home network automatically, or when you are
roaming under another network, you can select the friendly network
manually by yourself.
Current operator name.
Tap Automatic to let RTM-8000 select a
home network automatically.
Tap Manual to let RTM-8000 scan all
existing networks and you select one later.
If Manual is tapped, available networks
will appear in this box and you can tap
one and then tap the Register button to
select.