JonnyJaap , via OnePlus 8 Pro , Jun 1, 2020 : I already noticed on my old phone (Huawei though) that there was some Facebook system apps installed,I disabled them back in time. I noticed the same on my 8 Pro, and I bet it's on more phone. I searched online and could not find any real information, found just a post about that it also is installed on some Samsung device . I would like to know why these three Facebook system apps are installed on (probably) every Android phone,and what they do. After the name it sound like they have quest some permission or access on your phone. Facebook App Installer Facebook App Manager Facebook Services edit : I just disabled them a couple of days ago, so it was installed and worked in the background for two ish weeks. and it was sending data in the background, not a lot but stil.