If you want smoother Amazon sign-ins, order confirmations, and two-step verification recovery, adding a backup phone can help.
This guide explains how to add a backup phone to Amazon safely without exposing your account to avoidable risks.
Why a backup phone matters for Amazon accounts
A backup phone gives Amazon another way to contact you if your primary number is unavailable.
It can help with account recovery, login verification, delivery alerts, and password reset steps tied to your Amazon account and Amazon Prime membership.
For many users, the backup number becomes useful when:
- You change carriers or phone numbers.
- Your main phone is lost, damaged, or out of battery.
- You are traveling and cannot receive standard SMS codes.
- You want a second trusted number for account access and notifications.
Because Amazon uses phone verification as part of account security, the number you add should be accurate, reachable, and controlled by you.
How to add a backup phone to Amazon safely
The safest method is to add the number only from your official Amazon account settings and only on a trusted device.
Avoid links in suspicious emails or texts, and never share one-time passcodes with anyone.
- Sign in to your Amazon account from the official Amazon website or the Amazon app.
- Open Account & Lists, then go to Your Account.
- Find the security or login settings section, which may include Login & security or Account security.
- Select the phone number or mobile number option.
- Choose Add phone number or edit existing contact information.
- Enter your backup phone number and select the correct country code.
- Request the verification code sent by Amazon.
- Enter the code to confirm that you control the number.
- Save the changes and review your security settings.
Amazon may use different labels depending on region, app version, or device type, but the process follows the same basic pattern: sign in, open security settings, add the number, and verify it.
Security checks before you enter a backup number
Before you add any phone number, confirm that you are on the real Amazon site or app.
Phishing pages often imitate Amazon branding and ask for credentials or verification codes.
- Check the URL for the correct Amazon domain.
- Use the Amazon app downloaded from the Apple App Store or Google Play.
- Make sure your browser shows a secure connection.
- Do not use public Wi-Fi for account changes if a trusted network is available.
If a site or message pressures you to act quickly, treat it as suspicious.
Amazon security alerts may inform you of account activity, but they should not ask for your password through a third-party link.
Which phone number should you use?
Your backup phone should be a number you can access reliably and keep long term.
In many cases, a personal mobile number is better than a shared family line or work number.
Good options for a backup number
- A secondary personal mobile number.
- A SIM tied to a phone you keep available.
- A business phone only if you control it and can receive codes consistently.
Numbers to avoid
- Temporary or disposable numbers.
- VoIP numbers that do not reliably receive SMS from Amazon.
- Numbers used by multiple people.
- Numbers managed by a previous employer or service provider.
If you are setting up Amazon two-step verification, choose a number you expect to keep active.
Changing it later is possible, but it is better to avoid unnecessary recovery issues.
How to verify the backup phone securely
After you enter the number, Amazon typically sends a code by SMS or call.
This step proves that the number belongs to you and is not being added by someone else.
Follow these secure habits:
- Enter the code only inside your Amazon account settings.
- Never read the code aloud to another person.
- Do not send the code by email or messaging apps.
- Delete the message if you use a shared device.
If the code does not arrive, wait briefly and request a new one instead of repeatedly submitting information.
Too many attempts can trigger a temporary lock or added verification.
How to keep the backup phone private
A backup phone improves security only when it is protected like sensitive account data.
Treat the number as part of your account recovery setup, not as casual contact information.
- Use a phone with a passcode, fingerprint, or Face ID.
- Keep the SIM card under your control.
- Enable carrier protection against SIM swap fraud when available.
- Review which devices are signed in to your Amazon account.
- Update your recovery information after any number change.
Account takeover often starts with weak recovery settings.
A secure backup number is useful, but it should be paired with a strong password and two-step verification.
Common mistakes when adding a backup phone
Many Amazon account problems happen because users rush through setup or use outdated contact details.
Avoid these common errors.
- Using the wrong country code: This can prevent verification or route the code incorrectly.
- Adding someone else’s number: That person may receive sensitive account messages.
- Trusting a message link: Always go directly to Amazon instead.
- Ignoring old numbers: Remove phone numbers you no longer control.
- Reusing weak passwords: A good backup number cannot compensate for a compromised password.
If you share an address or household account with others, review delivery and account settings carefully so only the right person can change recovery details.
What to do if Amazon will not accept the number
Sometimes Amazon rejects a phone number because of formatting, carrier restrictions, or regional limitations.
If that happens, troubleshoot methodically.
- Confirm the number is typed correctly.
- Check the country code and remove extra spaces or symbols.
- Try a different browser or the Amazon app.
- Ensure the phone can receive standard SMS messages.
- Ask your carrier whether short-code messages are supported.
- Remove and re-add the number only through your Amazon account settings.
If the issue persists, Amazon Customer Service may help verify whether your account settings, region, or device are causing the problem.
When to remove or replace a backup phone
Update your backup phone whenever you no longer trust the number or no longer control the device.
Old numbers are a common security weak point.
Replace the number if:
- You changed carriers and lost access to the old line.
- The phone was stolen or lost.
- The number was reassigned or disconnected.
- You suspect unauthorized access to your account recovery information.
After updating the number, check your Amazon account for any unfamiliar devices, recent orders, or changes to delivery and payment settings.
Best practices for stronger Amazon account security
Adding a backup phone is only one part of account protection.
To make the setup more effective, combine it with broader security habits used across online services like Amazon, Google, and Apple ID.
- Use a unique password for Amazon.
- Turn on two-step verification.
- Review login alerts and security notifications.
- Keep your email account secure, since Amazon recovery often depends on it.
- Monitor recent orders and saved payment methods regularly.
When your email, password, and recovery phone all stay current, it becomes much harder for an attacker to lock you out or redirect account notifications.