To update your trusted phone number for Apple ID recovery, go to Settings on your iPhone or iPad, tap your name at the top, then select Password & Security. Choose Edit under Trusted Phone Numbers, then add a new number or update the existing one. You’ll need to verify the number with a code sent via SMS or call. For lost access, visit iforgot.apple.com to recover your Apple ID and reset your password. Ensuring your trusted phone number is up-to-date helps secure your account and enables seamless recovery if needed. Always use a number you can access reliably.