Unusable frequencies in Service Mode? - T-Mobile Samsung Galaxy Note 3

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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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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【Q】Why do I only get 3G symbol rather than H or H+ on the top?

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When I switch to my G2(T-MOBILE HTC VISION) on the same network. it shows H+ on the top. So why SG2 only shows 3G? Is it something to do with ROM?
Most likely the (custom?) ROM you are using. I would run a couple of speedtests to find out if you are getting HSPA+ speeds (with an inaccurate network icon) or is it already showing your correct max speed.

Supported Bands

I just found a chart of bands supported by this phone and I went and highlighted the sprint section. I originally found it HERE
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I wish band 3 was open, i travel to a few asian coutries which offer band 3 coverage on my prepaid sims
Sent from my SM-G920P using Tapatalk

OnePlus 7T Force LTE (Unlocked AT&T)

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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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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