passwords

Hello, I am on iOS v10.0.2 and don't want to update to latest version. I don't want someone accidentally updating it when using my iPAD. Is it possible to set a password against software update? Thanks.

I have an iPad2 and iPhone 4S running IOS 9.1. Over the last few weeks, maybe longer, I get frequent requests from various app to log into my Yahoo mail account (specifically, to enter the password). Even though the Mail app is happy to access my Yahoo email (so it thinks I'm logged in), apps...