I had an SE, 11 didn't slow it down. 12 was made to be faster than 11 even on the oldest supported devices. The SE has the internals of the 6S, only a couple ge

I had an SE, 11 didn't slow it down. 12 was made to be faster than 11 even on the oldest supported devices. The SE has the internals of the 6S, only a couple generations behind, so it'll be fine.