How do I change the cell phone number on an account when SMS codes fail?
Answer
When SMS codes block a phone-number change, use the service’s alternate verification methods first, such as email codes or authenticator app prompts. If the old number is dead, you usually need official account recovery instead of the normal settings form.
Before you start: stop right away if…
- Never share SMS codes with someone who contacts you claiming to help change the number.
Follow these steps
Try a non-SMS sign-in method
Sign in using email verification, an authenticator app, or saved passkeys if offered, instead of waiting on SMS.
You should see: You reach account security settings without needing the old phone’s texts.
Update the number from security settings
Open the official account Security or Login & security page and choose Change phone number, then follow prompts for the new number.
You should see: The new number is accepted, or the site demands proof via the old number.
Use official recovery if the old number is required
If the form will not proceed without a code to the inaccessible old number, start the provider’s account recovery flow and submit the identity checks they request.
You should see: Recovery either restores access to change the number or gives a review timeline.
Confirm the new number with one successful code
After the number changes, request one test code to the new phone and save a backup authenticator or email method immediately.
You should see: The new number works and a backup method is in place.
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Extra tips
What to look for: Whether the error is “cannot change number,” missing SMS codes, or rejection of the new number format.
Before you change anything: Have access to the account email and any authenticator app. Keep the new phone nearby for a test code. Avoid random “account unlock” services.