Hello @wbarul ,

Welcome to our community.

To properly configure MU-MIMO settings, please follow these steps:
1. Log in to your router's web interface at http://tplinkwifi.net
2. Navigate to Advanced > Wireless > Wireless Settings
3. Look for the MU-MIMO or OFDMA settings section
4. Select either "OFDMA + MU-MIMO" or your preferred option
5. Click the Save button to apply the changes
6. The router may need to reboot for the settings to take effect

If the setting still doesn't activate after following these steps, try these troubleshooting tips:
• Clear your browser cache and cookies, then log in again
• Try using a different web browser
• Reboot your router manually after changing the settings
• Make sure your router firmware is up to date