Yes, you can change your number on WhatsApp without losing your chats

WhatsApp lets you change the phone number linked to your account while keeping all your message history, groups, and contacts intact. The process takes a few minutes and happens entirely within the app — you do not need to contact WhatsApp support or reinstall anything.

The key is using WhatsApp's built-in Change Number feature rather than straightforward switching your SIM card or phone number with your carrier. If you switch your number without telling WhatsApp first, the app will treat it as a new account, and you will lose access to your old chats and groups.

Key Takeaways

  • Use the Change Number feature in WhatsApp settings to move your account to a new phone number while keeping all your chats and groups.
  • You need both your old and new phone numbers active and able to receive SMS or calls during the process.
  • The change takes effect when ready after you verify your new number, and your contacts will see your updated number in their address books.
  • If you change your number without using this feature, you will lose access to all your message history and groups.

How to change your number step by step

Open WhatsApp and go to Settings (the gear icon on Android, or the three dots on iPhone). Tap Account, then Change Number. You will see a screen asking for your old number and new number.

Enter your old phone number in the first field — use the full format with country code (for example, +1 for the United States). In the second field, enter your new phone number with the same format. Tap Next.

WhatsApp will send a verification code to your new number via SMS or a phone call. Enter that code when prompted. Once verified, your account switches to the new number. This usually takes less than a minute.

After the change is complete, WhatsApp will notify all your contacts that you have a new number. Your message history, groups, and settings stay exactly as they were.

What you need before you start

Both your old and new phone numbers must be active and able to receive messages or calls. If your old number is already disconnected or no longer works, you cannot use the Change Number feature — you will need to set up WhatsApp as a new account on your new number instead.

You also need to be signed into WhatsApp on the phone that has your old number. If you have already switched phones or SIM cards, go back to your old number temporarily (or ask your carrier to reactivate it briefly) to complete the change.

Make sure you have a stable internet connection — WhatsApp uses data to send the verification code and sync your account to the new number.

What happens to your chats and groups

All your one-on-one conversations, group chats, photos, videos, and voice messages stay on your phone and remain linked to your account. You do not lose anything when you change your number through WhatsApp's official feature.

Your groups will show that you have changed your number, but you stay in every group you were in before. Group admins do not need to re-add you or approve anything — the transition is automatic.

What your contacts will see

WhatsApp sends a notification to everyone in your contact list telling them you have changed your number. The notification appears as a system message in your chat with each person, so they know the new number belongs to you.

If a contact has your old number saved in their phone's address book, their WhatsApp will update it to your new number automatically. If they do not have you saved at all, they will see the notification but may need to manually update your number in their contacts.

If you already switched your number without using Change Number

If you changed your phone number with your carrier and WhatsApp created a new account on your new number, your old chats are still on your old account. You cannot merge two WhatsApp accounts or recover chats from the old one into the new one.

Your best option is to restore from a backup if you have one. WhatsApp automatically backs up your chats to Google Drive (Android) or iCloud (iPhone) if you have enabled backups. When you set up WhatsApp on a new phone with the same number, you can restore from that backup during setup.

If you do not have a backup, those chats are not recoverable. This is why using the Change Number feature before switching your number is important.

Changing your number on a new phone

If you have already moved to a new phone and want to change your WhatsApp number, the process is the same — you still need access to your old number to verify the change. If your old SIM card is no longer in any phone, ask your carrier whether they can reactivate it temporarily or provide a temporary SIM with your old number.

Some carriers will let you use your old number on a different phone for a few hours just to complete account changes like this. Call your carrier's customer service and explain that you need temporary access to your old number for security purposes.

Frequently Asked Questions

Do I lose my WhatsApp chats if I change my number?

No. Using the Change Number feature keeps all your chats, groups, and media. You only lose chats if you switch your number without using this feature and do not have a backup to restore from.

Can I change my WhatsApp number if my old number is no longer active?

No, you need your old number to be active and able to receive a verification code. If it is disconnected, contact your carrier to see if they can reactivate it temporarily, or set up WhatsApp as a new account on your new number.

How long does it take to change my WhatsApp number?

The process usually takes one to two minutes once you enter both numbers and verify the code sent to your new number. Your account switches when ready, and your contacts are notified right away.

Will my contacts know I changed my number?

Yes. WhatsApp sends a notification to everyone in your contact list telling them you have a new number. The notification appears as a system message in each chat.

What if I do not receive the verification code on my new number?

WhatsApp will offer to send the code via phone call instead of SMS. If you still do not receive it, check that your new number is active and can receive messages. Wait a few minutes and try again, or restart WhatsApp and repeat the process.