Does 19.1 work better than 20.0? And I was wondering if 20.1 was the latest version on 8.4 because there are posts from people on iOS 9 who were on a higher carrier bundle. Just wondering if that applied to 8.4 as well and if so, if it showed improvement.
Also, were you able to jailbreak iOS 8.4 when running iTunes 12.2? Taig is saying it can't find the Apple/iTunes driver?