how to Run a Coroutine even game is paused?

i need to run a Coroutine function from starting to end of the game even game is paused in background.
I checked application.runinbackground = true.

unity it self telling like the above method will be ignored on android and ios.

now how can i achieve this for android and ios.

thanks

Right here: Yield WaitForSeconds outside of time.Scale - Questions & Answers - Unity Discussions