The default multi-mode settings on your MiFi work for most Wi-Fi clients, however, some older devices require that you set one of the Wi-Fi bands to support older BGN standards:
1. Access the MiFi Admin web UI. Tether your device to the MiFi with the USB-C cable. On the MiFi touchscreen, select Access Internet (USB & Wi-Fi) and click OK. Open any web browser and go to http://my.MIFI/ or http://192.168.1.1.
NOTE: If you have another device that can connect to your MiFi, you can use it to access the Admin web UI.
2. Navigate to Wi-Fi > Settings. Under 2.4 GHz Band Settings, use the drop-down to change the 802.11 mode to 802.11 bgn.
NOTE: This allows older devices to connect on the 2.4 GHz band but leaves the 5 GHz band in multi-mode to allow newer devices the fastest available connection.
3. Click Save Changes. Your MiFi will reboot, and the network name should be visible on all devices.