i kow how to access to the white list menu, but there is no 'duraspeed' in the list.
should i install duraspeed first ?

Hi, First, I'm sorry for my bad english. I own a BV4900pro since 6 month. Android is up to date. Since the begining, I'm unable to keep my apps working in background. I set to OFF the battery manager for theses apps, but after a few hours, theses apps are not running. Facebook, Messenger, Outlook, E...