Have you decided to sell your smartphone or just want to get rid of the digital garbage that has accumulated over time? In both cases, you will need to perform a complete data deletion procedure. This is not just deleting files, but a deep cleaning of the system, which returns the device to its “out of the box” state.
This process is irreversible, and therefore requires careful preparation. Many users mistakenly believe that simply deleting photos and contacts is enough, but this is not the case. Residual files and account linking can create serious problems for both you and the future owner of the gadget.
In this article we will analyze in detail all the stages of preparing and performing a full reset. We will look at the nuances of working with Google Account, features of data encryption and methods that guarantee the impossibility of recovering personal information.
Preparing the device for complete data deletion
Before pressing the treasured reset button, you must perform a number of critical steps. Ignoring this step may result in the phone being locked for the new owner or you losing access to your backups forever.
The very first step is to create a backup copy of all important data. You can use cloud services or transfer files to your computer via a USB cable. Make sure that your contacts, message history, and media files are saved.
Pay special attention to authenticators and banking applications. If you have Google Authenticator or similar two-factor authentication apps installed, be sure to transfer the keys to a new device or create backup passcodes.
⚠️ Warning: Deleting your Google account without first disabling FRP may result in your phone being locked after the reset. The new owner will not be able to activate the device without your password.
☑️ Checklist before resetting
After saving the data, you must log out of all accounts. This applies not only to the main Google profile, but also to additional services, such as Samsung Account, Mi Account or third-party cloud storage.
Disabling FRP protection and logging out of accounts
The Factory Reset Protection (FRP) function was introduced by Android developers to protect against theft. It links the device to the last entered Google account. If you perform a reset without logging out of your account first, the phone will ask for a password for this account when you set it up for the first time.
To avoid this situation, go to the device settings. Find the section Accounts or Users and accounts. Select your Google profile and click the Delete accountbutton. Repeat this procedure for all added profiles.
Some manufacturers add their own levels of protection. For example, on devices Xiaomi you need to turn off Mi Find Device, and on Samsung you need to log out Samsung Cloud. Without this, the phone can turn into a “brick” for a stranger.
What is FRP and how does it work?
FRP is a security mechanism that checks for the presence of a previously synced Google account after performing a hard reset. This prevents the use of a stolen phone, since an attacker will not be able to complete setup without the owner's password.
Make sure the lock screen is also disabled. Go to the security settings and remove the PIN code, pattern or fingerprint. This will simplify the verification process before the final reset.
Standard reset via the Android settings menu
The easiest and safest cleaning method is to use the built-in system menu. This method is suitable for most modern smartphones, regardless of the brand and version of the operating system.
The algorithm of actions may differ slightly depending on the manufacturer's shell, but the general logic remains the same. You need to find the section responsible for restoring the device to its factory state.
Usually the path looks like this: go to Settings, then select System or General settings. Find item Reset or Recovery and reset. Here you will see the option Reset data.
| Manufacturer | Path to reset | Features |
|---|---|---|
| Pixel / Motorola | System → Advanced → Reset settings | Clean Android, minimum steps |
| Samsung | General settings → Reset → Reset data | Requires screen password confirmation |
| Xiaomi / Redmi | Advanced settings → Reset settings | Additional verification of Mi account |
| Huawei / Honor | System and updates → Reset | May require Huawei ID password |
On the confirmation screen, the system will warn you that all data will be deleted. Please read the list of deleted information carefully. If you are sure that the backup has been made, click the confirm button.
Before clicking the "Reset" button, turn off the Internet (Wi-Fi and mobile data). This will prevent you from accidentally syncing new data or triggering device search functions at the last moment.
The process will take a few minutes. The device will reboot and you will see the initial setup screen, just like when you bought a new phone in a store.
Hard reset via Recovery Mode
What to do if the phone does not turn on, is stuck on the screensaver, or you forgot the pattern key? In such cases, a recovery mode is used, known as Recovery Mode. This method allows you to clean your phone even without access to the desktop.
To enter this mode, you must use a combination of physical buttons. This usually involves pressing the power button and one of the volume buttons at the same time. Combinations vary among different manufacturers.
Typical combinations for entering Recovery:- Power button + Volume Up
- Power button + Volume Down
- Power button + Volume Up + Down (for some Sony models)
After turning on the phone, hold the buttons until the logo or recovery menu appears. In the menu, navigation is carried out with the volume buttons, and selection is done with the power button. You need to find the item Wipe data/factory reset.
⚠️ Attention: In Recovery mode, the touch screen does not work. Be careful when selecting menu items, as confirmation of the action often occurs without additional warnings.
After selecting a reset item, the system may request confirmation, prompting you to select Yes or Factory data reset. Confirm the action. When the process is complete, select the item Reboot system now.
This method is more crude and does not always unlink accounts correctly if the phone is turned on. Therefore, use it only in emergency situations when access to settings is impossible.
Cleaning external memory and SIM card
The internal memory of the phone is not the only place where data is stored. Many users actively use memory cards microSD to store photos, music and documents. A standard phone reset often does not affect external storage devices.
Before selling or transferring the device, be sure to remove the memory card. If you plan to keep the card, format it on your computer or other device. If the card remains with the phone, it also needs to be cleared.
To format the card inside the phone, go to Settings → Storage. Select your SD card and find the item Format or Clear. Choose the option to format as internal or portable storage depending on your needs.
Don't forget about the SIM card. Although modern SIM cards have limited space for contacts, older models could store hundreds of numbers. Go to the app Contact, open settings and select Import/Exportto make sure there are no entries left on the SIM.
Resetting your phone does NOT automatically delete data from the microSD card. This must be done manually through the storage menu or on a computer.
Also check the folder Downloads and other directories where files from instant messengers could be saved. Even after deleting applications, their media folders may remain in memory.
Checking for data remaining and security
After performing the reset and initial setup (or just turning it on), it is important to make sure that the cleaning was successful. Boot your phone and go through the initial setup steps until the desktop appears.
Check the gallery, file manager and contact list. There should not be any files belonging to the previous owner. Pay special attention to messenger folders, such as WhatsApp or Telegramif they came from the cloud.
If you are selling a phone, do not log into your Google account after the reset. Leave your device on the welcome screen. This will give the buyer the opportunity to customize the phone and ensure that the FRP function will not work again.
For increased security, before selling, you can fill the phone's memory with random data (for example, shooting a long video in an empty room), and then reset it again. This will complicate data recovery using special apps.
⚠️ Attention: Menu interfaces and item names may differ depending on the Android version and the manufacturer's shell. Always check the official instructions for your specific model.
Can data be recovered after a reset?
Theoretically, data can be recovered using special equipment if the memory cells have not been overwritten with new information. That is why it is recommended to fill the memory with “garbage” before the final sale.
Now your device is completely ready for transfer to a new owner or for clean operation without old digital luggage.
Will resetting remove viruses and malware?
Yes, a full reset to factory settings (Factory Reset) removes everything user applications and data, including most viruses and malware, as they reside in the user memory partition. However, if the virus has penetrated deep into the system (root access, system partition), a reset may not help.
What to do if the phone asks for an old account after a reset?
It was the FRP protection that worked. You will have to remember the password for the last Google account you synced. If you sold your phone, contact the buyer to remotely remove the device from your account through the Google website, or enter the data yourself when setting up for the first time.
How long does the hard reset process take?
The process usually takes from 5 to 15 minutes depending on the amount of internal memory and the speed of the phone's processor. Encrypting data before deleting may increase this time.
Do I need to remove the SIM card before resetting?
It is advisable. Although the reset does not affect carrier data, removing the SIM card will prevent accidental calls or charges during the reboot process, and will also protect the contacts on the SIM card from potential errors.