The need to completely clean a smartphone arises for various reasons: the device is being prepared for sale, the user plans to give the gadget to a relative, or the phone requires deep software resuscitation after a failure. Device owners Samsung face this problem regularly, especially considering the high liquidity of these devices on the secondary market. Simply deleting files through Explorer does not guarantee security, since special utilities can recover deleted photos and messages.
The process of deleting all information from a phone Android Samsung requires a systematic approach. It's not enough to just press one button if your goal is privacy. It is necessary to take into account synchronization with cloud services, account protection Google and specific brand security settings, such as Knox. Ignoring these aspects may result in the new owner of the device gaining access to your data or, conversely, not being able to activate the phone due to being locked.
In this article we will analyze in detail all the stages of preparing and performing a hard reset. We will look at both standard methods through the settings menu, and more radical methods through recovery mode Recovery. You will learn how to properly prepare external drives and what precautions should be taken to ensure that the process goes through without fatal errors.
Preparing the device for a full reset
Before you begin to destroy data, it is critical to create a backup copy of everything valuable. After completing the procedure, it will be impossible to restore information using standard means. Use the built-in tool Samsung Cloud or synchronize contacts and calendar with your account Google. For photos and videos, it is recommended to use a computer or external hard drive, as cloud storage may have capacity limitations.
Particular attention should be paid to two-factor authentication. If you delete data without unlinking your phone to banking applications or instant messengers, logging into accounts from other devices may be blocked. Make sure you have access to backup recovery codes or the ability to get SMS to another SIM card.
☑️ Checklist before resetting
Don't forget to remove the memory card microSDif it is installed. Resetting your phone sometimes offers the option to wipe the external storage, but physically removing the card is the most reliable way to keep the data on it or be sure to delete it separately. Also remove SIM cardto avoid accidental blocking by the telecom operator when changing ownership.
Disabling account protection and security functions
Modern smartphones Samsung equipped with a powerful system of protection against theft. The FRP (Factory Reset Protection) function links the device to the last entered Google account. If you perform a reset without logging out of your account first, the new owner will be faced with a lock screen that requires you to enter your password. This may make the phone useless for sale.
To correctly disable the protection, you need to go to the settings and manually delete all accounts. Go to section Settings → Accounts and backup → Account management. Here you will see a list of all linked services: Google, Samsung Account, Microsoft and others. Select each of them and click the "Delete account" button.
⚠️ Attention: If you forget your Google Account password, do not reset! First, restore access through the Google website on your computer, otherwise the phone will turn into a “brick” with an activation lock.
It is also worth disabling the function Find My Mobile (Search for my device). This service allows you to remotely lock and wipe data, but it can also prevent a new user from activating the device. Disabling is done in the security settings or through a special section in your Samsung account. Make sure the feature status is changed to Off.
What is FRP Lock?
FRP (Factory Reset Protection) is an Android security mechanism that is automatically enabled when you add a Google account. Its purpose is to prevent the device from being used after an unauthorized factory reset. If the phone is stolen, the thief will not be able to use it even after flashing it, since the system will require you to enter the password for the last account. To legally sell, you must log out of your account before resetting.
Method 1: Reset through the settings menu (Standard method)
The safest and easiest way to delete all information is to use the system's built-in menu. This method is suitable for most users whose phones are in working order and unlocked. The interface may differ slightly depending on the shell version One UI, but the logic of actions remains the same.
Open the settings menu and scroll down to the item General settings (or simply “General”). Find the section Reset. Here the system will offer several options: reset settings, reset network settings and completely reset data. We need exactly the last item, which is often called “Data reset” or “Factory Data Reset”.
The system will show a list of data that will be deleted: photos, music, downloaded files, system settings and application data. Please study this list carefully. If you see something there that you didn't plan to delete (for example, synced contacts that are not saved in the cloud), stop and check your backups.
| Data type | Will be deleted | Recovery possible |
|---|---|---|
| Photos and videos (internal memory) | Yes | Only special. software |
| Contacts (SIM/Phone) | Yes | No |
| Apps & Games | Yes | Yes (through the store) |
| Wi-Fi settings and Bluetooth | Yes | No |
| Files on the SD card | No (if not selected) | Yes |
To confirm the action, the system will ask you to enter a PIN code, a graphic screen unlock key or password. This is the final line of protection against accidental pressing. After entering the code, a Reset or Delete everythingbutton will appear. Press it and the phone will reboot, starting the cleaning process.
If you have device encryption enabled (by default on Android 6.0+), then after the reset the old data becomes unreadable even for recovery apps, since the decryption key is deleted along with settings.
Method 2: Hard Reset via Recovery mode
If the phone is frozen, does not boot, or you have forgotten the unlock password, the standard method is not available. In this case, recovery mode is used Recovery Mode. This method is more aggressive and allows you to delete information even when the system is not working. However, on new models Samsung with Android 11 and higher, entering this mode often requires connecting to a computer via a USB cable.
Turn off the device completely. If the phone does not turn off due to freezing, press the Volume down and Power buttons for 7-10 seconds until the screen goes blank. Immediately after turning off (or if the phone was turned off), hold down the combination of buttons. For models with a button Home this is Home + Volume up + Power. For new models without a Home button and with a side fingerprint scanner: hold Volume Up + Power and simultaneously connect the cable to the PC.
When the logo appears Samsungrelease the Power button, but continue to hold the Volume Up button until the Recovery menu appears. This menu is navigated using the volume buttons and selected using the power button. Select item Wipe data/factory reset.
⚠️ Attention: In Recovery mode, the touch screen does not work. Be extremely careful when navigating with buttons so as not to accidentally select an item that erases firmware sections, and not just user data.
The system will ask for confirmation, usually this is item Factory data reset or Yes. Confirm your choice. After completing the process, which takes a few minutes, select Reboot system now. The phone will reboot to its original state, as after purchase in a store.
Clearing external memory and cloud traces
Many users mistakenly believe that resetting the phone clears everything. This is wrong. Files saved on the memory card microSDremain untouched during a standard reset unless you explicitly select the option to format them. Moreover, in cloud storage, your data can remain accessible even after the phone is destroyed.
To delete data from a memory card, insert it into the phone (if you removed it) or into a computer card reader. In the phone storage settings, select the memory card and find the item Format. Please note: when formatted as "internal memory", the card is encrypted and will not be readable by other devices. To transfer the card to the new owner, it is better to format it as “portable storage” or simply delete the files manually via a PC.
Don’t forget about the “digital footprint” on the Internet. Go to your Google account security settings on your computer. In the "Your devices" section, find this phone and click Exit or Delete device. This will break the connection between the phone and the cloud, ensuring that new photos or notes created by the new owner (if he logs into your account by mistake) will not reach you, and your old data will not be pulled up to the reset device.
Check also linked services, such as Samsung Pay or banking applications. Although the data from the card is deleted when reset, it is worth removing the linked device from the list of trusted ones in your bank account. This will increase the security of your financial transactions in the future.
Checking the result and transferring the device
After the reboot, the phone will launch the initial setup wizard. You will see a language selection screen. This is a signal that the removal of information was successful. If the phone immediately loaded into the desktop with your icons, the reset was unsuccessful and the procedure must be repeated.
Do not log into your Google account at this stage. Leave your phone number on the welcome screen. This is the best way to transfer the device to the buyer: he will customize it for himself, enter his account and feel like the first owner. Logging in on your end can restart synchronization and bring back some of the data from the cloud.
A perfectly prepared phone for sale greets its new owner with a language selection screen and contains no traces of previous use, accounts or files.
If you plan to keep the phone as a spare, still don't set it up right away. Keep it turned off in a dry place, charging the battery once every 3-6 months to a level of 50-60% to avoid deep discharge of the lithium-ion battery.
⚠️ Attention: On devices with AMOLED screens, prolonged display of a static image (for example, the settings screen) at high brightness may cause pixel burn-in. If the phone is set up and not in use, set a short screen timeout.
Frequently asked questions (FAQ)
Is it possible to recover data after resetting Samsung?
The chances are minimal, but theoretically they exist. On modern phones with Android 6.0 and higher, the data is encrypted. A reset removes the encryption key, rendering the remaining bits of information on the flash memory unreadable garbage. However, if the phone was old (Android 4-5) and not encrypted, special data recovery apps may try to read the remaining files. To be completely guaranteed, before resetting, you can fill the phone's memory with unnecessary large files (videos), and then reset the settings again - this will overwrite the memory sectors.
Will the Android version be deleted when resetting?
No. A factory reset (Factory Reset) returns the software to the "factory" state for the current firmware version. If you updated your phone to Android 14, it will remain on Android 14, but without your apps and settings. To downgrade the Android version, a complex flashing procedure through the Odin app is required, rather than a simple reset.
What to do if the phone asks for an account password after a reset?
It was the FRP protection that worked. This means you didn't sign out of your Google Account before the reset. You need to enter the login and password for the Google account that was last on this device. If you have forgotten your password, you need to recover it through the Google website. It is impossible to bypass this protection in legal ways without a password - this is protection against theft.
How long does the data deletion process take?
Usually the process takes from 5 to 15 minutes, depending on the amount of full memory and processor speed. On older models with more data, this may take longer. The main thing is not to interrupt the process and not remove the battery (if it is non-removable), as this can damage the file system.
Do you need to remove the SIM card before resetting?
It is advisable. While a factory reset doesn't affect SIM card data (contacts saved on the SIM are usually unaffected but can be deleted if you select the option), removing the card ensures you don't accidentally send a message or lose contacts stored on it alone. In addition, this eliminates any network interactions during the process.