1. Find "Mobile Connections"
Click Mobile Connections.
2. Select network manually
Click the search icon.
Your data card now searches for networks within range and a list of options is displayed.
Highlight the required network.
Your display will tell you if you've access to the network you've chosen. If you don't have access, it's because your operator doesn't have a roaming agreement with the operator in question.
Click OK to close the window.