Enabling/Disabling IPv6 on Cellular Modems
You can enable and disable IPv6 on cellular modems either from the Unit Panel or from the Web Interface.
Unit Panel
From the Home menu, tap
>
.Toggle the IPv6 cellular modems field on or off to enable or disable IPv6.
Web Interface
From the Web Interface, in the sidebar, click Settings > System.
In the Preferences section, toggle IPv6 cellular modems on or off to enable or disable IPv6.

Preferences