Changing a mobile number is always stressful, especially when it comes to messengers, where all business and personal correspondence is concentrated. For users Android the transition process should be as smooth as possible so as not to lose a single important dialogue. The main task is not just to install a new one SIM cards, but to correctly transfer the account within the application so that all your contacts automatically know about the changes.
Many people make the mistake of simply deleting the old account and registering again, which leads to losing the message history and leaving all group chats. The correct algorithm of actions allows you to save all media files, privacy settings and channel subscriptions. In this article, we will analyze the step-by-step process of how to correctly notify all interlocutors and transfer data without the participation of third-party services.
Before proceeding with technical manipulations, make sure that the new SIM card is active and capable of receiving SMS messages or calls for confirmation. The old number must remain active at least at the start of the procedure, since the security system WhatsApp may request a confirmation code from the old device before the final transfer.
Device preparation and data backup
Before starting any operation that involves changing accounts, it is critical to create a fresh backup. This is your insurance against unexpected network failures or errors during the migration process. On devices Android the backup is saved either in local memory or in cloud storage Google Drive, which is the most reliable option.
Go to the application settings and check the date of the last save. If it was done a week ago, urgently initiate a manual save. Make sure that your smartphone is connected to a stable network Wi-Fias uploading large amounts of media files to the cloud can take considerable time and consume mobile traffic.
⚠️ Attention: If you use a password to encrypt your backup, be sure to remember it before starting the procedure. Without this key, it will be impossible to restore chats on a new number, even if the file is successfully uploaded to the cloud.
Also check the available space on the internal storage of your gadget. The process of changing a number sometimes requires temporary duplication of databases. Free up at least 1-2 GB of space by deleting unnecessary cache files or old downloads so that the system runs smoothly.
☑️ Ready to change number
Using the built-in number change function
The messenger developers have provided a special tool for such cases, which automatically notifies your contacts. You don't have to manually write to each person. The function Change number is located deep in the settings menu and launches the data migration wizard.
To start the process, open the application menu (three dots in the upper corner) and select Settings. Next, go to the section Account and find the option Change number. The system will immediately warn you that your number will be changed in all groups, and the correspondence history will remain untouched.
What happens to groups when you change a number?
When using the official number change function, you automatically remain in all groups. The old number is removed from the lists of participants and a new one takes its place. Group administrators receive a notification about the change, but you do not need to request to re-join.
In the window that opens, you will be asked to enter two numbers: the old (current) and the new (target). Enter the data carefully, following the international format. After entering, press the button Nextto proceed to selecting a contact notification strategy.
Setting up notifications for contacts and groups
At this stage, the system will prompt you to select who exactly needs to be notified about the change in details. This is a flexible setting that allows you to maintain confidentiality or, conversely, notify the environment as widely as possible. You can choose one of three scenarios depending on your goals.
- 📢 All contacts: the notification will be sent to all people in your phone book who have your number, regardless of whether you communicate with them or not.
- 💬 Contacts with open chats: the message will only come to those with whom you have active correspondence or common groups at the moment.
- 🎯 Selected contacts: you can manually tick only those people who are critically important to know about your new number.
If you use a smartphone for business, it is recommended to select the option with all contacts or carefully filter the list. For personal purposes, it is often sufficient to notify only those with whom you are actively communicating. Remember that in group chats, a notification is sent automatically in any case if you select the option to inform groups.
After selecting an audience, the system will generate a standard message like: “I changed my WhatsApp number. Please save my new number." This message will be sent as plain text to private conversations. You cannot change the text of this automatic notification, but you can add something of your own immediately after completing the procedure.
Confirmation process and data transfer
After setting up notifications, the technical part of the process will begin. The application will ask you to confirm the new number. Your new one SIM card will receive an SMS with a six-digit code. Enter it in the appropriate field on the smartphone screen.
In some cases, especially if a lot of time has passed since the last activity on the old number, the system may require you to confirm the old number. This is a security measure to prevent account hijacking. If the code does not arrive to the old number, make sure that the SIM card is still in the phone or in forwarding mode.
| Process stage | User action | Expected result |
|---|---|---|
| Data entry | Enter old and new numbers | Activation of the transfer wizard |
| Verification | Entering an SMS code from a new SIM | Confirmation of ownership of the new number |
| Migration | Waiting for completion (automatically) | Transferring profile and chat history |
| Notification | Sending messages (automatically) | Informing contacts about changes |
As soon as the code is entered correctly, the process of transferring information will begin. The screen may go dark or freeze for a few seconds - this is normal. Do not try to force close the application or restart the phone at this point, as this may damage the database.
⚠️ Attention: Application interfaces are updated regularly. If you do not find the “Change number” item in the specified location, check the “Help” section inside the application or check the current menu location in the official help at the time of the operation.
Possible problems and ways to solve them
Despite the well-established procedure, users Android sometimes encounter technical problems difficulties. Most often, problems are related to access rights or software version conflicts. If the process is stuck at the verification stage, check for updates for the messenger itself in the store Google Play.
Another common problem is an error when trying to create a backup copy before a change. This often happens if the Google Drive runs out of free space. In this case, free up space in the cloud or choose the option to save only to your local device, although this is less reliable.
If the new SIM card does not accept SMS, try inserting it into another phone to receive the code, and then enter the code on the main device. The main thing is that the SIM card is active at the time of the request.
In rare cases, old chats may not load immediately after changing the number. Don't panic and delete the app. Just close it completely through the multitasking menu and open it again. Typically, the background synchronization process will exit within a few minutes of restarting.
Post-migration verification and security
After the procedure is successfully completed, be sure to check that all your data is in place. Open several important conversations and make sure that your entire conversation history is saved, including sent images and documents. Also check your privacy settings: sometimes when you change your number, the visibility settings for your profile photo or “Been online” status are reset.
Pay attention to two-factor authentication. If it was enabled on the old number, it will automatically be transferred to the new one. However, if you plan to sell your old SIM card or give it to someone, make sure that access to the account is completely closed to the old owner of the number.
Using the built-in “Change number” function is the only way to save group membership and correspondence history without losing data. Manual re-registration will result in the creation of a new empty account.
It is also recommended to check the list of associated devices. If you are using WhatsApp Web or the desktop version on a computer, you may need to rescan the QR code to link sessions to the new phone number.
Frequently asked questions (FAQ)
Will I lose my groups after changing my number?
No, if you use the built-in number change function inside the application. You will remain in all groups you were previously in. If you simply delete your account and create a new one, you will be excluded from all groups, and administrators will have to add you again.
Will my contacts see my new number in general chats?
Yes, in group chats your number will be updated for all participants. However, if the person does not have your new number saved in their phone book, they will simply see it as numbers. In personal chats, the number will be updated only for those you selected when setting up the notification.
Can I change the number if I use WhatsApp Business?
Yes, the procedure is similar. The version WhatsApp Business also has the function of changing the number in the account settings. At the same time, your business profile, product catalog and labels will be preserved. Clients will receive a notification about the change of details.
What should I do if I have already deleted my old account?
If the account has already been deleted, it cannot be restored through the number change function. You will have to register again with a new number. The correspondence history will be lost if you do not have a local copy of the database on the device, which you can try to restore manually through a file manager, but this is a complex procedure with no guarantees.
Do you need to report a change of number in the status?
This is a good additional measure. In addition to automatic mailing, it is recommended to set a temporary status with a text about the number change. This will help those contacts who may have missed an automatic message or do not have you in the current list of active correspondence.