Moved to Verizon with my LGV60 phone, probably worst decision ever.

I switched a couple of days ago to T-Mobile from Verizon and brought my device.

Phone Model: LG V60 ThinQ 5GUW (LM-V600VM)

I was assured by the sales person y the website device compatibility check I should get 4G and 5G (but maybe not UC which is understandable).  SUPRISE! I am now stuck on 3G and “E”. After calling support I was pretty much suggested I should have researched "possible" band incompatibility issues and not to expect full compatibility. Weird thing is when I restart my phone, toggle off/on airplane mode I get 5G for about 45 seconds and 5G speeds. I absolutely love this phone and any current phone model you have I fee is a downgrade and definitely not worth the monthly financing and down payment required, in my opinion based on research.

Troubleshooting steps already taken and possible critical details:

• Manually configured APN settings.
• Rebooted phone.
• Tried all modes of service/network types. It is actualmente on Global, but I seem to only have a constant 5G connection when network type is CDMA/LTE - however I cannot make any calls in this mode.
• Swapped SIM cards for a new one.
• Reset Network Settings on the device.
• Have confirmed this phone with Verizon can go up to 999mbps under the 5GUW service.

Instead of going in circles with troubleshooting, there has to be someone in this big giant company that can simply tell me this phone is not compatible for XYZ reason, and would be nice if you red flag it for anyone else who can get caught up in my situation.