No matter how the optimization of Apple, the hardware has been eliminated models, is not under iOS 11 has a good performance, not to mention the new system of small problems, including Tucao largest battery of Apple has so far no good improvement.
We should also remember that after iOS 11 was released, Apple switched off all system-channel downgrading channels but only let iPhone 6S go. However, this benefit has quietly disappeared because they have quietly shut down the downgrade channel.
The situation is the case, late last night, Apple officially closed the iPhone 6S iOS 10.3.3 downgrade channel, that did not have time to downgrade the user, but also must stay in iOS 11.
From July 20 this year, the iPhone 6S iOS 10.3.3 update until now, and the aircraft can brush the current version of the minimum is iOS 11.0.1. Before there are many upgrades iOS 11 iPhone 6S owners complain that the system Caton obvious, with iOS 10 or a big difference.