D-Link DWR-966 User Manual page 22

Internet Network Scan
This function scans for nearby network providers.
4G Network Selection Method: Choose Auto to scan for network
providers and its network service automatically. To manually scan for
networks, choose Manual, then click Scan Networks to scan for
networks.
After scanning, nearby network providers and the network service they
use will be listed in the chart. For example, you can choose only to use
either 2G, 3G or 4G networks of a designated service provider.
Select your desired network provider and then click Apply to apply the
changes or click Scan Networks to scan again.
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