Add information about battery savers issues to the FAQ at jami.net
Investigating ring-daemon#429 I've learned that mostly all the popular Android phones have built in power saving mechanisms that cause issues with connectivity.
For example, to make Jami work at Samsung Galaxy S20+, you have to disable two different options hidden in different places.
I guess, we should add this information to the FAQ and recommend to use Don't kill my app (or any other FOSS alternative) to disable these technologies. Otherwise, any regular Android user will face connectivity issues and won't be able to solve them themselves.