Then I'm confused that you said you locked to B3 but you said you didn't get any connection - that's why I thought you were only getting B20
Yes it is confusing. If I lock it to only B3, nothing seems to work. If I don't lock it, it works, but says it's connecting to B3. Perhaps its just how the router is working, or the app I'm using isn't doing what it says.
The app says different things in those fields whilst locked though.
Locked:
Band: B3-1800Mhz F/TDD: 1800
Unlocked:
Band: B3-1800Mhz F/TDD: 80800C5
When locked, I cannot browse the internet. When unlocked, though showing the same band, I can. I assume there is some aggregation going on, that the app is not telling me, unless the F/TDD is telling me that, though I do not know how to understand the value.
When I select all available bands in the app and then apply them, only the following bands remain selected:
B1, B3, B7, B8, B20, B28, B38.
Curiously now my F/TDD is stating 20080800C5
I think perhaps all of this is a red herring anyway