What’s the best way to draw attention about a thing in the configuration process that may happen or not but that can be very important if it happens?

I've the following problem in my mobile app development.

There are some services which can be launched from the beginning after a device is restarted or whatever that makes it to boot.

Problem is that some mobile manufacturers by default forbid apps to do that unless you explicitly allow them to autostart in a security app the phone owns.

I've ways to check what the phone manufacturer is and open its app to set the autostart, but problem is that it can be hard to do, it may be difficult to know which manufacturers exactly do that, and I'll have to change code for each manufacturer and even maybe for the phone model, this looks like too much work.

So, I'm thinking for a way to make the user read that and check for the option, because, let's be honest if a user is in configuration process he usually even doesn't know what he has accepted or not, he's let's go forward, forward, forward... end.

So which would be a good way so the user says "ok this must be big, I've to stop here" and read the text that explains about manually setting the app to autostart in a configuration process?