Change the order of preferred networks
Before you begin: To perform this task, your BlackBerry smartphone must be connected to a GSM or UMTS network.
Depending on your wireless service plan, this feature might not be supported. Your smartphone connects to networks
based on the order that they appear in the preferred network list.
On the home screen, click the connections area at the top of the screen, or click the Manage Connections icon.
Click Networks and Connections > Mobile Network.
key > My Preferred Network List.
Highlight a wireless network.
key > Move.
Click the new location.
key > Close.