Devices require IPV4, but TMHI is IPV6 only..

Sorry but I could not disagree more with Wicked.  I have use T-Mobile Home Internet for about 9 months. I am running a ASUS mesh network behind it and have turned off everything not needed on the T-Mobile box.  I have about 35 devices hung on the meshnet work and use LocalXpose tunnels to reach those devices remotely.  The system has run flawlessly ever since I completed the installation. The latest devices T-Mobile supplies does not allow WI-FI to be turned off from the interface but a quick Google search will find a hack to make that modification.