Changing the main account on a mobile device often becomes necessary when buying a used gadget, selling an old device, or simply if you want to separate personal and work correspondence. Many users mistakenly believe that this procedure necessarily requires a factory reset, which entails the loss of all installed applications, photos and system settings. However, modern versions of the operating system Android allow you to manage accounts much more flexibly, making it possible to add new addresses and make them the main ones without drastic measures.
The process of replacing the linked mailbox may vary depending on the manufacturer of your smartphone - be it Samsung, Xiaomi or “clean” Google Pixel. Menu interfaces may differ visually, but the logic of working with profiles remains the same for the entire ecosystem. It is important to understand the difference between a simple change of address in an email client and a complete replacement of the system account Googlethat synchronizes contacts, calendars and store purchases Play Market.
In this article we will look in detail at safe methods for updating contact information, consider the nuances of synchronization and answer the questions that smartphone owners most often have when trying to change key login parameters. You will learn how to save important data when switching to a new account and what steps need to be taken to ensure that the device continues to work correctly.
Preparing the device for changing the account
Before you begin to directly change the settings, it is critical to back up your data. Even if you plan to simply add a new mailbox and not delete the old one, any manipulation of system profiles carries the risk of accidental loss of information. Make sure that your contacts, photos and documents are saved in cloud storage or on external storage.
Check the stability of your Internet connection, since the process of verifying a new address requires constant access to the provider’s servers. An unstable signal can lead to an authorization error and blocking the login attempt for a certain time. You should also make sure that the smartphone battery is charged at least 50% so that the device does not turn off at the most crucial moment of setup.
⚠️ Attention: Before deleting your old Google account, make sure that you remember the password for it. In some cases, the system may request identity confirmation through the old mailbox to protect against unauthorized access.
If data encryption or the Find My Device function is enabled on your device, write down the current credentials on paper. This will help avoid a situation where the phone is locked after a reboot and requires you to enter a password for a deleted account that you have already erased from memory.
☑️ Preparing to change email
Adding a new mailbox to the system
The first step to updating your email is to add a new address to the system settings. This process does not delete old data, but only expands the list of available profiles. Go to the main settings menu of your smartphone and find the section responsible for managing users.
Depending on the version of the shell, this item may have different names. It is usually located at the top of the list or in the “System” subsection. Find item Accounts or Users and accounts. Click on the add button, which is often indicated by a plus icon or the words “Add account” at the bottom of the screen.
The system will prompt you to select the type of account to create. To fully work with the application store and services, select the logo Google. If you only need corporate mail or a mailbox from a third-party service (for example, Mail.ru or Yandex), select the appropriate item in the list. Enter a new email address and password following the prompts on the screen.
- 📧 Enter the full email address, carefully checking for typos in the domain part.
- 🔑 Create a strong password using a combination of letters and numbers to protect against hacking.
- ✅ Confirm your login using the code that will come to you form SMS messages or push notifications to another trusted device.
- 🔄 Wait for the synchronization to complete, the indicator of which is usually displayed in the status bar.
After successful addition, the new profile will appear in the general list. You can now switch between mailboxes in the Mail or Gmail app, but the old account is still active in the system. To make the new address your primary, you need to complete additional steps, which are discussed in the following sections.
If you are adding a corporate Exchange account, you may need to enter the server address manually. This data is provided by the system administrator of your organization.
How to make a new mail the main one on Android
Many users are faced with the fact that after adding a second mailbox, applications by default continue to use the old address to synchronize contacts and download updates. Unfortunately, in pure Android the concept of “main account” is strictly tied to the one that was entered first when initially setting up the phone.
To actually replace the old mailbox with a new one without resetting the settings, you can use a workaround by deleting the old profile. However, this will only work correctly if you have previously added a new account and logged in to it. Go to menu Settings → Accounts, select the old email address.
Click on the menu button (three dots or gear) and select the “Delete account” option. The system will warn you that all data synchronized with this profile (contacts, notes, call history) will be deleted from the device. Since you've already added a new mailbox, you can later restore the necessary data from the new profile's cloud.
⚠️ Attention: Deleting a Google account from a device does not remove the mailbox itself from the Internet, but it erases all local copies of it from the phone. Without the Internet, it will be impossible to restore contacts.
After deleting the old profile, the system may require a reboot. The next time you log into a store Play Market or other Google services, you will be asked to select an active account. Select the one you added earlier. Now it will become the only one and, therefore, the main one for this device.
What happens to application data?
When you change the main account, purchases in the Play Market remain tied to the old box. To download updates for paid applications, you will have to periodically add the old account back to the system.
Synchronization setup and data transfer
Once the new email address has become active, you need to configure the synchronization settings so that the information is automatically updated on the device. Go to the settings of the new account and make sure that the switches opposite the “Contacts”, “Calendar” and “Documents” items are in the active position.
If you previously saved contacts on the old mailbox, you can transfer them. To do this, export contacts from the old account to a file format .vcf via the mail web interface or contacts application, and then import this file, selecting the new address as the saving location. This will ensure the safety of the phone book when the profile is completely replaced.
| Data type | Transfer method | Risk of loss |
|---|---|---|
| Contact | Export/Import VCF | Low |
| Photos | Google Photos / Cloud | Medium (depends on location) |
| Passwords | Google Password Manager | High (need access) |
| Applications | Manual installation | None |
Pay attention to the settings for auto-uploading photos. If you used the backup function to Google Photos under an old account, new pictures may be uploaded there by default. Open the Photos app, tap your profile avatar and switch to your new account, then turn on auto-upload.
Changing mail in specific applications
Often the user needs to change mail not in the entire system, but only in specific services, such as YouTube, Google Drive or third-party messengers. In the Google ecosystem, this is done through profile switching within the application itself. Open the desired app, click on your profile icon in the corner of the screen.
In the drop-down menu you will see a list of all accounts added to the system. Just tap on the desired address to switch the application's operating context. For some services, for example Google Play Games, progress may not be transferred automatically, since it is tied to the unique ID of the old account.
For third-party applications that are not part of the Google ecosystem (for example, Telegram, Viberbanking applications), the mail change usually occurs in settings section of the application itself. Find “Profile” or “Security” and click “Change email”. Confirmation will be required via a code sent to both the old and new addresses.
- 📱 In the messenger Telegram email is an optional field for two-factor authentication; it can be changed in the section
Privacy. - 🛍️ In marketplaces, changing your email may require re-verification of payment data.
- 🎮 In gaming services, progress is often lost when changing an account if a cross-platform login was not used.
If the application does not allow you to change your email directly, the only way out may be to delete the old account from the system (as described above) or completely reinstall the application and log in with new data. Always check whether the service supports multiple logins.
Solving common login problems and errors
When trying to update their email, users may encounter various system errors. One of the most common problems is the "Login failed" message or endless loading when syncing. Most often, this is due to an incorrectly entered password or account blocking by Google security due to suspicious activity.
If the system requires login confirmation through an old device that you have already sold or is broken, use backup recovery codes. You can get them on the Google account management page via your computer by going to the security section. Enter one of the one-time codes instead of the password on the phone.
⚠️ Attention: If you bought the phone second-hand and it requires entering the previous owner's account (FRP Lock), updating your mail yourself is impossible. You must contact the seller to delete his account or provide the purchase receipt to the service center.
It is also possible that a new account is added, but does not synchronize contacts. Check your energy saving settings. Some shells (MIUI, EMUI) aggressively limit background running of applications. Add Google services to the battery exceptions list to ensure synchronization occurs correctly.
Most sign-in errors can be resolved by checking the date and time on the device. If the clock is down, security certificates are not validated and entry is blocked.
Frequently asked questions (FAQ)
Will all information be deleted from the phone when you change email?
No, if you just add a new account and switch to it, the data remains in place. Complete deletion of data occurs only when resetting to factory settings or when manually deleting the old account from the system (in this case, only data associated with this specific mailbox is deleted, for example, contacts saved in it).
Is it possible to completely delete an old Google account without a password?
It is usually possible to delete an account from the phone settings without a password if the device unlocked. However, if FRP (Factory Reset Protection) protection is triggered, the next time you reset the settings, the phone will be locked and require the password from the last synchronized account. Be careful when deleting your only Google account.
Will purchased applications be lost after changing email?
Applications purchased on the old account remain linked to it. You can use them on your phone, but you will have to update them through the old mailbox. To receive updates, it is recommended not to delete the old account completely, but simply disable its synchronization and use the new one for basic tasks.
How to transfer Chrome history to a new email?
Chrome browser history is linked to your Google account. There is no automatic transfer of history from an old mailbox to a new one. You can export bookmarks to an HTML file via a computer and import them into a new account, but the browsing history will remain on the old profile.
Is it safe to enter new mail details on someone else's Wi-Fi?
It is always better to enter passwords from your mail and Google account through a secure connection. If you're using public Wi-Fi, make sure the site or app is using HTTPS. For maximum security, when setting up a new account for the first time, use the mobile data (4G/5G).