[totallyashill]

To everyone hoping to avoid the problem, make sure you disable automatic updates if you are still on 12.1.1 or earlier.

Settings > General > Software Updates > Automatic Updates

[RossM]

Turns out 12.1.2 is the non-optional “your phone is updating tonight” I received Wednesday. (Appeared to be mandatory anyway).

[sys_64738]

I'm sticking with iOS 10.3.

[tambourine_man]

If you can upgrade, you should. iOS 12 is the best version in a long time.

[jeffhuys]

Yeah. Battery life, speed, everything is better on 12. Especially on older devices, like mine (6s). Don't need a new one for at least 1 / 1.5 years.

[sys_64738]

You must be one of the few 6S people to claim 12 is better. Pretty much all I've talked to regret every going to 11 or 12 on the 6S.

[r00fus]

11 sucked for older iPhones. 12 brought the magic back and new useful features.

[c1sc0]

My 6S is doing fine. Got the new battery and i’m good for another year on it.

[sys_64738]

iOS 10 is way better than 11 or 12, especially on battery life. Battery life is terrible on 12 so no I won't and never will 'upgrade'.

[tambourine_man]

Not my experience. SE here, and 12 is great, but suit yourself.

[bonestamp2]

12.1.1 that is.