To unlink email/phone number from your account:
  1. Go to your profile by tapping "Profile".
  2. Tap the three dots on the top right corner of the screen.
  3. Select "Manage account".
  4. Tap "Phone number"/"Email" and select "Unlink".
Notes: If your account is only linked with phone number/email, or you only use password to log in, you cannot unlink it due to account security.

If your account has phone number/email 2-step verification enabled, please disable it first, and try to unlink your phone number/email again.