iOS 12.4.9 Speed / Performance and Battery test…
iOS 12.4.9 was released by Apple November 5th so long over due for me to dig out the old devices from the bottom of the drawer and get them ready for one, maybe last, round in the circus.
iOS 12.4.9 adds no new features so not expecting any revolutionary stuff in terms of performance / battery enhancements.
It seems like you can also still jailbreak iOS 12.4.9. So there are not real reason why you should not upgrade from any other older version iOS 12.
I will run a comparison anyways to see if there are any signs of performance improvements, just the same.
I will also include a side by side battery test video of the iPhone 6 as those devices have new batteries. Lets go !