For the last 6 months or so I've been testing various configurations using LHG LTE's against Verizon, T-Mobile, and AT&T.
LHGR - LTE4 - T-Mobile: Solid performer, no real issues.
LHGR - LTE6 - T-Mobile: Absolute CRAP. Pointing at the same tower as the LTE4 yet half the speed.
LHGR - LTE6 - AT&T: Disappointing, but probably an AT&T issue. I was only ever able to get around 8Mbps thru AT&T but was able to get CA running, but STILL only 8M per chan. (8x2)
LHGR - EC25 - Verizon (Visible): Surprisingly solid performer, no real issues, and going thru the Visible sub, they have not throttled even once when exceeding Verizon's normal 20G.
I am now trying to get an EP06-A running. Having lots of issues but hope to test against Verizon and T-Mobile soon.
And someday I'd love to get a 5G modem card and test that... but, I'm not going to hold my breath.