Full reset Samsung Galaxy J4: from menu to buttons

The smartphone Samsung Galaxy J4, released in 2018, is still a reliable device for many users, but over time, even it can encounter serious software glitches. Cache accumulation, conflicts of installed applications, or critical system errors often lead to the phone becoming unstable, freezing, or even refusing to boot in the usual way. In such situations, the only effective solution is to completely return the device to its original state, known as Hard Reset or reset to factory settings.

This procedure completely clears the internal memory of the gadget, deleting all user data, including photos, contacts, messages and installed apps. Android the device returns to the state in which it was immediately after purchase in the store. It is important to understand that this process is irreversible without a previously created backup copy, so before starting any action you need to critically evaluate the importance of the files stored on the phone and take measures to save them to external media or cloud storage.

There are several ways to perform a reset on the model SM-J400F or SM-J400M: through the standard settings menu, if access to the system is saved, or using combinations of physical buttons if the phone is locked or does not turn on. The choice of a specific method depends on the current technical condition of your device and your ability to get to the main menu. Next, we will analyze each of the methods in detail, paying special attention to the nuances of working with this particular model of the budget segment.

Preparing the device and saving data

Before taking radical measures, you need to make sure that you have completed all the preparatory steps, since after pressing the confirm button, it will be almost impossible to recover deleted files without special tools. First of all, check the battery charge: the level should be at least 50-60% so that the phone does not turn off at the most crucial moment of flashing the data section. A sudden power outage during the format can lead to damage to system files and turn the smartphone into a “brick.”

Synchronization with your account Google is a key point in preparation. Make sure your contacts, notes, and calendar data are synced to the cloud. To do this, go to Settings → Accounts and backup → Account management and select your Google profile. Click the sync button and wait for the process to complete. Also, do not forget to check if the Find My Device function is enabled, since after resetting the system may request the password from the last used account for security purposes (FRP protection).

• 📸 Back up photos and videos to a microSD memory card or download them in Google Photos.
• 📞 Export your contact list to a file .vcf and save it in internal storage or send it to your email.
• 🔋 Connect the phone to the charger and make sure that the indicator shows a stable charge.

⚠️ Attention: If your phone has a memory card installed, remove it before starting the reset. This will prevent accidental formatting of external data and protect your media files from being deleted.

Some users ignore the need to log out of their accounts before resetting, relying on the fact that the reset itself will clear the data. However, on modern versions Android (including those on J4), it is better to manually delete your Google account through the settings before the procedure. This is guaranteed to remove the FRP (Factory Reset Protection) lock and you won't have to remember old passwords after turning on a clean phone. Go to your accounts settings, select Google and click “Delete account.”

Reset through the settings menu (Soft Reset)

If your Samsung J4 turns on, the screen responds to touches, and you can freely navigate the interface, then this is the safest and preferred method. It minimizes the risk of errors, since the system itself correctly terminates all background processes before starting cleaning. Go to the main menu and find the gear icon, which represents the settings section. Depending on the firmware version (Android 8.0 Oreo or later), the interface may differ slightly, but the logic remains the same.

You need to find the section responsible for general system management. It is usually called General settings or simply System. Scroll down the list to Reset. Here the system will offer several options, but we are interested in the only correct one - Reset data (or “Factory settings”). When you click on this item, the phone will show a detailed list of what will be deleted: accounts, system settings, downloaded applications and files in the internal memory.

Why reset after Are menus better than buttons?

A soft reset through settings allows the system to correctly close all active applications and services. This reduces the risk of logical errors occurring in the file system after a reboot, as opposed to a hard reset, which is more brutal and forceful.

On the confirmation screen, the system will require you to enter the PIN, pattern, or password that is used to unlock the screen. This is a security measure to prevent accidental or unauthorized reset of the device by unauthorized persons. After entering the code, a final warning will appear. Press the button Delete everything or Reset device. The phone will automatically reboot and the cleaning process will begin, which may take from 5 to 15 minutes depending on the amount of full memory.

Option	Description of action	Risks
Method	Through the settings menu	Minimum
Requirements	Working screen, knowing the password	No
SD safety	Data on the card is not affected	Absent
Execution time	5-10 minutes	Depends on the amount of data

After completing the procedure, the phone will reboot and greet you with the initial setup screen, as it was on the day of purchase. You have to choose a language, connect to Wi-Fi and sign in to your Google account. If you did not delete your account before resetting, it is at this stage that the system will ask you to enter its password. Make sure that you remember this data, otherwise you will not be able to access the device.

Hard reset using buttons (Hard Reset)

The situations are different: the phone may freeze on the logo, the screen may not respond to touches, or you could simply forget the pattern. In such cases, entering the settings menu is impossible, and the only way out is to use the recovery mode Recovery Mode. On Samsung Galaxy J4 entry to this mode is carried out by a combination of physical buttons. It is important to perform actions quickly and accurately, since timings matter.

First, turn off your smartphone completely. If the device freezes and does not turn off in the usual way, press the Volume Down and Power buttons simultaneously for about 7-10 seconds until the screen goes blank. As soon as the phone turns off, immediately press the combination to enter recovery: Volume Up + Home (central button under the screen) + Power. Hold all three keys.

When the Samsunglogo appears on the screen, release the Powerbutton, but continue to hold Volume up and Home. After a few seconds, the Recovery menu should appear with a black background and text (often blue or yellow). If an image of an Android robot with the inscription “No Command” appears, press the power button once and, while holding it, press the volume up button once - the menu should open.

Navigation in this menu is carried out exclusively by buttons volume: Volume up moves the cursor up, Volume down -down. The selection is confirmed using the button Power. You need to find the item Wipe data/factory reset. Move the cursor over it and press the Power button. The system will ask for confirmation - select Yes or Factory data reset.

• 🔘 Use the volume buttons to navigate through the items in the black recovery menu.
• ⏻ The power button serves as an analogue of a mouse click to confirm the selection.
• ⚠️ Do not select the “Wipe cache partition” item if your The goal is a complete reset, although clearing the cache can also help with some glitches.

⚠️ Attention: In Recovery mode, the touch screen does not work. Attempts to poke at the display will not lead to any result; use only physical keys.

After confirmation, the formatting process will begin. There will be a status bar at the bottom of the screen. When the process is completed, you will be back in the main recovery menu. Make sure Reboot system nowis highlighted and press the Power button. The phone will reboot. The first startup after a hard reset may last longer than usual - up to 5-7 minutes, as the system recreates the file structure.

Removing FRP lock (Google Account)

One ​​of the most common problems after a reset Samsung J4 is the appearance of the FRP (Factory Reset Protection) lock screen. This is a Google security mechanism that requires you to enter the password for the account that was synced with the phone before the reset. If you reset your phone through settings and previously deleted your account, this problem will not affect you. However, when using the (Hard Reset) buttons, the system considers that the device may have been stolen and blocks access.

If you remember your Google username and password, simply enter them when connecting to Wi-Fi at the setup stage. This will unlock the device. Difficulties arise if the data is lost or the phone was purchased second-hand and the previous owner did not unlink his account. In this case, it is impossible to unlock using standard means - this is the security policy. Android impossible - this is the security policy.

There are workarounds involving the use of vulnerabilities in the browser or special apps on the PC, but they depend on the specific version of Android security and the date of patch updates. For Samsung J4 methods using TalkBack or special combinations in the Phone application are relevant, but they require high technical literacy. It is often easier and more reliable to contact a service center with purchase documents confirming ownership of the device.

To avoid this headache in the future, always follow the rule: before selling or transferring the phone to another person, be sure to reset it through the settings menu, having first deleted all accounts in the section Settings → Accounts. This ensures that the new owner will be able to use the device unhindered, and you will not receive notifications about login attempts from an unfamiliar gadget.

Solving common problems after a reset

Sometimes, after returning to factory settings, users are faced with the fact that the phone behaves strange: it discharges quickly, heats up or does not see the network. This is not always a sign of a breakdown. After the first turn on, the system Android begins background indexing of files, downloading updates and synchronizing data. In the first 30-60 minutes of operation, the load on the processor Exynosinstalled in J4 may be increased, which causes the case to heat up.

If the battery discharges faster than usual in the first days, let the phone work in normal mode for a couple of days. The system optimizes application performance and energy consumption should stabilize. Also check to see if the Always-On Screen feature accidentally turned on or if the display brightness went up to maximum after a factory reset. Go to Settings → Screen and adjust the settings to suit you.

In rare cases, the phone may get stuck on the logo Samsung after rebooting from Recovery mode. This is called a "bootloop". If this happens, try repeating the procedure for logging into Recovery and select Wipe cache partition (clear cache partition) without touching the data reset. This will remove temporary system files that may have become corrupted. If this does not help, you may need to flash the device through a app Odin on your computer, which is a more complex procedure.

No network or Wi-Fi after a reset is often resolved by simply removing and reinserting the SIM card. Make sure the card chip is not damaged and is oriented correctly in the tray. Also check the access point settings (APN) in the mobile networks menu - sometimes after a reset they disappear and need to be re-entered according to your telecom operator. This data is usually available on the operator's official website.

Optimizing Samsung J4 performance after a reset

A clean system is a great start, but in order Samsung Galaxy J4 to work as quickly and stably as possible, it is worth applying several recommendations immediately after setup. This model has modest characteristics by modern standards, so you shouldn’t overload it with unnecessary processes. First of all, disable unnecessary animations and visual effects that do not carry a functional load, but consume graphics accelerator resources.

Go to the developer settings (if they are hidden, click on the build number 7 times in the “About phone” section). Find the items “Window Animation”, “Transition Animation” and “Animation Duration”. Set them to value 0.5x or completely disable them (Off). This will make the interface visually more responsive and faster. It is also worth limiting background processes in the same menu, setting a limit of no more than 2-3 processes.

Settings → About phone → Software information → Build number (press 7 times)
Settings → Developer options → Window animation scale (0.5x)

Do not install dozens of applications at once. Many of the so-called "boosters" or "memory cleaners" actually only waste battery power and slow down the system by constantly running in the background. Trust only proven software and official app stores. Regularly check for system updates in the Software updatesection, as Samsung periodically releases security patches even for models from previous years.

• 🚀 Reduce the animation scale in the developer options to speed up the interface.
• 🚫 Avoid installing "cleaners" and antiviruses of dubious origin.
• 📦 Transfer heavy applications to a memory card if the model supports this function (App2SD).

⚠️ Attention: The interface and location of menu items may vary slightly depending on the version of the One UI or Experience shell UI installed on your specific instance of J4.

Regularly rebooting the phone once a week helps clear the RAM of accumulated errors and “garbage”. It's a simple habit that extends the life of budget smartphones. Keep an eye on the free space in the internal memory - if it is more than 85% full, the system will start to work noticeably slower. Try to store large amounts of data on an external microSD card, setting the camera to save photos there by default.

Frequently asked questions (FAQ)

Will information be deleted from the memory card when resetting the Samsung J4?

No, the standard factory reset procedure only affects the internal memory of the device. All files saved on the microSD card (photos, music, documents) will remain safe. However, we strongly recommend removing the card before the procedure in order to exclude human error or accidentally selecting the wrong item in third-party utilities.

What should I do if the phone asks for a password for a Google account that I don’t remember?

It was FRP protection that worked. You need to regain access to your Google account through any other computer or phone by going to the Google password recovery site. If it is impossible to restore your account, the only legal way to unlock it is to contact a Samsung service center with a receipt for the purchase of the device, confirming your ownership.

How long does the reset process take on a Samsung J4?

The data formatting procedure itself usually takes from 5 to 10 minutes. However, the first boot after a reset may take longer - up to 10-15 minutes, as the system performs initial setup and optimization of applications. Do not interrupt the process, even if the phone seems stuck on the logo.

Can I interrupt the reset if I change my mind?

Once you have confirmed the action and the data deletion process has begun (a progress bar has appeared), it is impossible to interrupt the reset without consequences. Trying to turn off your phone will damage the operating system. You can only cancel the operation at the confirmation screen stage, before clicking the final “Delete everything” button.

Will the phone return to the version of Android that it had when purchased?

No, a factory reset returns the software to the state it is in now, but with cleared user data. If you previously updated your phone to Android 9.0 or 10.0, it will remain at that version. To roll back to an older version, a complete flashing via a computer is required.