If you need to call someone on your iphone and you see some of your contents are missing from your iphone, many iphone users are facing this issue after updating. If you are facing iPhone contacts that disappeared after the update issue too and you want to fix it then here we mention some easy steps to fix this issue.
You need to sign out and sing in again on iCloud
You should change contact group settings
For contact you need to turn iCloud on and then off
Select your iphone as default
Use finder and iTunes for restoration iphone contacts