Cannot get a secondary signal

I have the latest firmware update 1.2101.00.1609 running on the gray can, but was not seeing any secondary signal.  Don't know if this occurred because of the upgrade or before.  Did a reboot through the web interface and...voila...3 bars on 5G along with the previous 2 bars on LTE.

I thought this problem of having to reboot to get a secondary signal was fixed?  Who knows how often I'll have to check back and see if  I still have 5G?  I've been refreshing the web interface off and on for the past 30min and it's holding firm.  Will check back randomly next week.

I'm getting 200down/14up now, about a 40-50mb download speed increase since the reboot.  Anyway, took the plunge and dumped Comcast a month ago.  Fingers crossed T-Mobile keeps upgrading  their towers and improving their hardware/firmware.