Just got a 5G Gateway, trying to split 2.4 and 5 ghz bands - no option, even in web UI

CynB wrote:

It is very simple to add the 2.4 ghz.  You go to your T-Mobile INTERNET app.  SIgn up if you don't have it but this is what you use to connect your 5 ghz too.  Once you are in your app go to MANAGE YOU WI-FI Networks.  It should have the TMOBILE one that you created for your 5 GH.  Go into this one and see what the FREQUENCY BAND says.  You need to take it off of automatic and make it your 5 GHz.  

Then you simple go back to MANAGE YOUR WiFi NETWORKS and at the bottom hit the + sign and create a new one.  This is the one that you will make a 2.4 ghz wifi.   When you create the name for this 2.4 wifi YOU CAN NOT create a name with spaces.  I just did TMobile24 not sure if you can put a dot in there.  Once you create this you need to reboot your Router to have them both on there.  Look at your phone and see if it created both of them.

Hope this works for you!

I am trying this but the app wont let me change the "default" network. So I created a new 2.4 ghz but there is no way to alter the original dual band.