
BlackBerry 8520 Curve
Find "Mobile Network"
Press the Menu key.
Scroll to Options and press the Navigation key.
Scroll to Mobile Network and press the Navigation key.
Choose option
Choose one of the following options:
Select network manually, go to 2a.
Select network automatically, go to 2b.
Select network manually, go to 2a.
Select network automatically, go to 2b.

2a - Select network manually
Highlight the drop down list next to Network Selection Mode and press the Navigation key.
If you're out of range of the selected network, your phone will not work.
Scroll to Manual and press the Navigation key.
If you're out of range of the selected network, your phone will not work.
If manual network selection is turned on:
Scroll to Scan for Available Networks and press the Navigation key.
Scroll to Scan for Available Networks and press the Navigation key.
If you're out of range of the selected network, your phone will not work.
Your phone will search for networks within range and a list of available networks will show on your display.
Highlight the required network and press the Navigation key.
Highlight the required network and press the Navigation key.
If you're out of range of the selected network, your phone will not work.
Scroll to Select Network and press the Navigation key.
Your display will tell you if you have access to the network you've chosen.
Your display will tell you if you have access to the network you've chosen.
If you're out of range of the selected network, your phone will not work.
2b - Select network automatically
Highlight the drop down list next to Network Selection Mode and press the Navigation key.
Scroll to Automatic and press the Navigation key.
Exit
Press Disconnect to return to standby mode.