If you use a vivo phone, WeChat will not be able to retrieve your friends and chat records after deleting them, and you need to add friends again. You can find your friends through the praise or comments of your circle of friends. You can also re-add friends through mobile phone number, WeChat account, scan code, etc. You can also consult the software side for details.
If you have more questions, you can go to official website /vivo Mall APP-My-Online Customer Service or the webpage link of vivo official website webpage version-Slide to the bottom-Online Customer Service-and enter the manual customer service for consultation and understanding.