Enable World Mode

I have a -W 7921 wireless phone and -N 1242 autonomous wireless access point, it takes me some time to troubleshoot why it can't get connected. The answer is world mode. When you enable world mode, the AP adds channel carrier set information to its beacon. Client devices with world mode enabled receive the carrier set information and automatically adjust their settings.

Example
int dot11radio 0
world dot11d country-code US both