G4SE Not Staying on 5G UC

I just got a G4SE with the Rely plan. In the room where the G4SE (and the entire front of my house), my iPhone on T-Mobile stays on 5G UC. The G4SE reports "Excellent" "advanced cellular metrics" but frequently drops down to longer range band b12 LTE. This is on the first floor. I'll try moving the gateway to the second floor to see if I get further improvement in the cellular metrics.

In the current gateway location, it reports LTE metrics of:

* RSSI: -57, RSRQ: -6, RSRP: -65, SINR: 25 on band b12 on internal omni-directional antenna.

5G, when connected, reports:

* RSSI: -71, RSRQ: -10, RSRP: -83, SINR: 28 on band n25 on internal omni-directional antenna.

I had the gateway another room where it was using the directional antenna, but the numbers ranged from good to excellent. When I moved it to the front of the house, the numbers improved slightly.

I had one speed test on my iPhone of 749 Mbps down in the front of the house which is truly incredible. I typically see down speeds in the 200's and 300's. Ping and Jitter is **much** better than I thought wireless would be. Up and down speeds vary considerably, making the gateway more suitable to backup internet than primary internet.

My intention is for this unit to replace my cellular backup over Verizon. The T-Mobile gateway over LTE is substantially faster than my Verizon LTE backup.

Is there anything I can do to have the gateway stay on 5G more often? Should I switch to the Amplified plan to get the G5SE which may stay on 5G UC longer like my iPhone?

As a backup internet, T-Mobile internet with the G4SE on LTE, generally gives me the full bandwidth I need in a backup situation. 200 to 350 Mbps down is fine for backup. Upload speeds have been ranging from 15.6 Mbps to 77 Mbps, which is better than other cellular backup options. The upload speeds work in a backup situation. I've seen 104 Mbps up in the same room on my iPhone. I'm happy so far with the product for backup internet use. Should I just stay on Rely or should I upgrade to Amplified to get the G5SE gateway. I don't need more download bandwidth, especially downloads, but it doesn't hurt to have more.

For backup use, I'd prefer to have the options to turn off the WiFi radios and to get the IP address passthrough to my router, but otherwise it seems like this will work well.