Msgner app stores every contact from añy device that it hàs been signed into. Back some years ago wasn't clear permissions,With FB & MSGner linking too syncing everything .I can't sign in ATM to the confirm if it's still dóing the same béen a few years. Andróid ñot good though could keep Contacts from the gorge but Apple Even when factory reseting device if anyone or I signed into my àcc on the app. It would syñc all contact data from phone including previous users coñtacts to my Acc 70% With full Nick names and names ¡!