Revert to a previous version 8.20 in iOS

[Moss 0]

 With the latest update of 8.21, I’ve had zoom in and out issues. How do I revert back to 8.20 until they get this issue resolved for both iOS and android?

[PinkElephant 8,077]

It is only possible through workarounds to revert to older versions:

• With iTunes before ver 12.7 you could reinstall prior versions of apps via iTunes 
• If iTunes is beyond ver 12.7, this is no longer possible. Then there may be a way through the Apple configurator.

Both methods will not work in any case, depending on app history and availability, and they are still workarounds. If you need How-to-details I please search for it yourself. I just found some German explanation, and it sounds more complicated than practical.

By the way, I am quite happy with 8.21 both on my iPad Pro and my iPhone...