OnePlus 7T Force LTE (Unlocked AT&T) - OnePlus 7T Questions & Answers

The guy at the AT&T Store told me that since the 7T detects 2G & 3G, it'll automatically prefer those networks. Even after trying to manually register the network operator as AT&T 4G and trying to the "LTE Only" (pictured below) selection, I'm still stuck without and cell service. Any ideas?
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Unable to see at&t bands after flashing new rom

I just flashed a new rom and when I went into phone settings, the at&t bands are not showing. I like to set my phone to pick up only on those bands instead of auto. What is the registry hack to display all available bands? See picture to see what I mean. See how the 850/1900 GSM and UMTS bands are not showing? I still am able to get 3G on at&t.
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Unusable frequencies in Service Mode?

So I noticed that in the service menu (*#2263#) There's 3 frequencies that are present but when you select them it doesn't take affect.
The frequencies are 900MHz 3G and bands 20 and 3 4G LTE. Anyway these are usable somehow? It's odd they'd be in the Service Menu as an option but not work... also for some reason 2100MHz 3G is listed as "IMT2000"
Anway here's some screen shots of them.
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[Q] No LTE? (5.1, GPE, VZW)

So I've noticed recently that I'm ALWAYS on 3G. I flashed latest radios, 5.1, then DigitalHigh's GPE ROM. Everything works, except LTE apparently. I'm like 90% sure I got the radio file from the thread in the VZW section, but there's a possibility I did the wrong one.
It'll always be on Verizon's networks, but when I enable roaming (wasn't enabled by default), it always jumps to a Sprint PCS network (same result for two opposite sides of Los Angeles)...
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JIO Sim GSM+ 4G (India) DOESN'T WORK ON SPRINT NOTE 4

I just moved to India, UNLOCKED my phone with gt tools.
Put the sim but no signal, although Jio 4g app shows.
Also when choose to connect to a network manually or automatic a pop up notification says''the sim doesn't allow a connection to this network ''
Any help please, I don't want to buy another phone!
Dose not work even before and with another gsm carrier.
THANK YOU,
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LTE physical channel configuration

Hi!
Can someone tell me what the message in LTE Physical Channel Configuration means?
I only get H+ when turning mobile data on although my SIM supports 4G.
My girlfrind has a2 lite too. On her phone the LTE PCC is blank and she has 4G.
I never had 4G on my phone only 3G.
Can you please help me to enable it on my phone?
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