Why do new numbers keep adding in my existing contacts

[Android Central Question]

Hello, Im using a samsung s8 plus. New numbers have added to my existing contacts without me knowing so when I make a call it is directed to the new number

 

[B. Diddy]

Welcome to Android Central! Can you elaborate? Are you seeing these numbers in the Contacts app itself, or just in the Phone app's contact list? Are these new numbers being added to an existing contact in your Contacts app? Are they random numbers, or do they connect you to some kind of scam or advertising number?

 

[Rukbat]

Sounds like some strange sort of virus or Trojan. Try Avast Mobile Security & Antivirus and Malwarebytes Anti-Malware (they look for different things).

 

[Gayle Lynn]

If Google Contacts, login to Google Gmail on desktop using web browser.

Turn off sync for contacts in settings cloud backup.