I uninstalled some of the pre installed apps and disabled few others (which can not be uninstalled) very first day from my A50s.
But later when I was checking background activity, found strange thing. An app called "Facebook Services" was running in background and using mobile data in background even though I disabled the pre installed Facebook app. "Facebook Services" can not be found in Settings - Apps. But you can find via Settings search option.
Disable it. This is how big tech companies are stealing our personal details without our knowledge. Not sure how many more hidden apps are pre installed in our mobile.
