G4AR Gateway external antenna use

Thanks for the link to Waveform.  It is helpful when using their specific antennas, but I created my own 4x4 MIMO setup using a pair of 2x2 MIMO antennas that are mounted about a meter apart from each other, and clocked to 45 degree offsets from each other.  I had read in some antenna design lit about the offset giving possibly another 2-3 dB of improvement.  So I spent a couple of hours last night (trying to have a time where traffic to the cell tower might be minimal), and went through all 24 possible combinations of antenna hookups for the 4x4 MIMO array.  Documented what connections were established, and what down/up speeds were achieved.  Turns out that this TMO-G4AR box is only connecting to the B12 LTE band on the same tower, not trying to connect to the 5G n71 band that the Cudy P5 was locked onto.  I could see this using the third party HINT app.  I did find a group of about 4 antenna connection combos that seemed to give optimal LTE service (now getting about 30-35M down and 5M up).  But it is only about half the bandwidth in either direction of what I was getting the the 5G service.  TMO needs to fine tune the firmware on this router to allow it to do a better job of searching for the 5G service.