When I connect my laptop via copper cable to our fibre modem, I get just shy of the Gigabit.
Only a few handsets can achieve the Gigabit LTE. I don't think any iPhone is amongst them. (It is after all predominately an American device. And what good would that capability do you in the US?)
The Gigabit LTE is useful in practice not so much for any sustained Gigabit speeds, but because it allows your phones to 'race to idle'. Most traffic is bursty, and higher peak speeds mean your phone transmits for a smaller proportion of time. Leaving more time for other phones on the network, and perhaps helping with battery conservation?
Only a few handsets can achieve the Gigabit LTE. I don't think any iPhone is amongst them. (It is after all predominately an American device. And what good would that capability do you in the US?)
The Gigabit LTE is useful in practice not so much for any sustained Gigabit speeds, but because it allows your phones to 'race to idle'. Most traffic is bursty, and higher peak speeds mean your phone transmits for a smaller proportion of time. Leaving more time for other phones on the network, and perhaps helping with battery conservation?