You Can Downgrade from iOS 12.4.6
If you can't stand iOS 12.4.6's performance on your iPhone 5s, you can try downgrading to an older version of iOS 12.
Apple is currently signing on iOS 12.4.5 and iOS 12.4.4 which means you can use a loophole to get your device off iOS 12.4.6.
These options won't be available forever so if you want to move off iOS 12.4.6 you'll need to make your move sooner rather than later.
The company isn't signing on iOS 12.4.3, iOS 12.4.2, iOS 12.4.1, iOS 12.4, iOS 12.3.1, iOS 12.3, iOS 12.2, iOS 12.1.4, iOS 12.1.3, iOS 12.1.2, iOS 12.1.1, iOS 12.1, iOS 12.0.1, iOS 12.0, iOS 11.4.1 or any older iOS updates so there's no going back to any of those versions.
If you're unfamiliar with the downgrade process, take a look at our guide.