I think maybe some don't notice the problem as maybe spend a lot of time on wifi? Just a thought
My modem is 10.01.13 on iOS 10.1 B3Ios 10.0.3 is out and updates modem firmware to 1.00.05 from 1.00.03.
Carrier profile remains the same
I've had that too, but it doesn't last for long and soon drops back to 3Gbut if I turned 4G off and on again it climbed to 4G immediately.
Just an observation, but after a few hours of being back in the 6s everything seems so much better...Bluetooth connects no problem and parked car thing in maps works whereas with the 7 it was very glitchy