What a Factory Reset Does and When to Use It

A factory reset erases everything on your Samsung Galaxy phone — all apps, photos, messages, contacts, and settings — and returns it to the state it was in when it left the factory. After a reset, you will see the initial setup screen, just as if the phone were brand new.

You should reset your Galaxy when you are selling or giving away the phone, when it is running so slowly that basic tasks stall, when an app keeps crashing no matter how many times you restart, or when you want to remove a pattern, PIN, or password you no longer remember. A reset is also the last troubleshooting step before taking the phone to a repair shop.

Before you reset, back up anything you want to keep. A factory reset cannot be undone — once it starts, the data is gone. Samsung phones back up to your Samsung account automatically if you set it up, but you can also back up to Google Drive, a computer, or an external memory card if your model has one.

Key Takeaways

  • A factory reset deletes everything on your phone and cannot be reversed, so back up your photos, contacts, and messages before you start.
  • You can reset through Settings on most Galaxy phones, or through the recovery menu if the phone will not turn on or respond to touch.
  • If you have a pattern, PIN, or password lock, you will need to enter it before the reset begins — the phone will not let you reset without it.
  • After the reset completes, the phone will restart and show the initial setup screen, and you can sign back into your Samsung or Google account to restore your data.
  • A factory reset takes 5 to 15 minutes depending on how much data is on the phone, and the phone will restart several times during the process.

Backing Up Your Data Before You Reset

Open Settings and tap Accounts and backup (the exact name varies by model — it may say Accounts or Cloud and accounts). Tap Samsung account and sign in with the email and password you use for Samsung services. Tap Backup and select what you want to save: contacts, messages, apps, home screen layout, and settings are the most common options. Tap Back up now and wait for the process to finish — this usually takes a few minutes.

If you do not have a Samsung account, you can back up to Google instead. Open Settings, tap Accounts and backup, then Google account. Sign in with your Google email, tap Backup, and choose what to save. Google backs up contacts, calendar, Gmail, and some app data automatically once you turn it on.

For photos and videos, open the Gallery app, tap the three-line menu in the top left, and tap Settings. Turn on Cloud sync or Backup (the name depends on your model). This uploads your photos to your Samsung or Google account so you can read them after the reset.

Resetting Through Settings on a Working Phone

Open Settings and scroll down to General management (some models call it System). Tap Reset or Reset options. You will see several choices: tap Reset all settings if you only want to clear settings and keep your apps and files, or tap Factory data reset or Erase all data if you want to wipe everything.

The phone will ask you to confirm and may ask you to enter your PIN, pattern, or password. This is a security step — Samsung wants to make sure you actually own the phone. Type it in and tap Reset or Erase. The phone will show a progress bar and restart one or more times. Do not turn off the phone or remove the battery during this time, even if it seems to be taking a long time. Most resets finish in 5 to 15 minutes.

When the reset is complete, the phone will restart and show the Welcome screen or Setup wizard. You can now sign into your Samsung account or Google account to restore your backed-up data, or set up the phone as new.

Resetting a Phone That Will Not Respond or Turn On

If your Galaxy phone is frozen, will not turn on, or will not respond to touch, you can reset it using the recovery menu. This is a hidden menu that runs before the phone's normal operating system starts up.

First, turn off the phone completely. Press and hold the Power button and the Volume Up button at the same time for about 10 seconds. The phone will vibrate and show the Samsung logo. Keep holding both buttons until you see the recovery menu — it is a black screen with white text and a menu of options.

Use the Volume Down button to move down the menu until Wipe data/factory reset is highlighted. Press the Power button to select it. The phone will ask you to confirm — use Volume Down to highlight Yes and press Power to confirm. The phone will erase all data and restart. This process takes longer than a settings-based reset, sometimes 20 to 30 minutes, so be patient.

What Happens After the Reset Is Complete

Your phone will restart and show the initial setup screen in English (or the language you set before the reset). You will be asked to choose a language, connect to Wi-Fi, and sign into a Google account or Samsung account. You do not have to sign in right away — you can skip these steps and set up the phone later.

If you backed up your data to a Samsung account, sign in with that account during setup and the phone will ask whether you want to restore your backed-up contacts, messages, apps, and settings. If you backed up to Google, sign in with your Google email and the phone will restore your Google contacts, calendar, and Gmail automatically.

Photos and videos you backed up to Google Photos or Samsung Cloud will read in the background once you connect to Wi-Fi. This can take several hours if you have a lot of photos, so do not be alarmed if they do not appear when ready.

Common Mistakes and How to Avoid Them

The most common mistake is resetting without backing up first. Once the reset starts, there is no way to stop it or recover your data. Before you reset, spend 10 minutes backing up to your Samsung account, Google account, or both. If you have already reset and lost photos, you may be able to recover them with a data recovery app, but this is not may provide and works best if you act quickly.

Another mistake is turning off the phone or removing the battery while the reset is running. The reset process writes over your data in stages, and interrupting it can leave the phone in an unusable state. Even if the reset seems to be taking a very long time, let it finish. If the phone is completely unresponsive after 30 minutes, you can try a hard restart by holding the Power button for 10 seconds, but do this only as a last resort.

A third mistake is forgetting your PIN, pattern, or password before you reset. If you have a lock screen, you must enter it to confirm the reset — the phone will not let you bypass it. If you cannot remember it, you will need to contact Samsung support or take the phone to a repair shop.

Restoring Your Data After the Reset

After you sign into your Samsung account or Google account during setup, the phone will ask whether you want to restore your data. Tap Restore or Yes. The phone will read your contacts, messages, app list, and settings from the cloud. This can take 10 to 30 minutes depending on how much data you have and how fast your internet connection is.

Your apps will not read automatically — you will need to open the Play Store app and tap your profile icon in the top right, then tap Manage apps and device. Tap the Manage tab and you will see a list of apps you have installed before. Tap Install next to each app you want to put back on the phone. You can also tap Install all to read everything at once, though this uses a lot of data and battery.

Photos and videos will appear in the Gallery app as they read from Google Photos or Samsung Cloud. If you backed up to an external memory card, insert the card after the reset and the phone will recognize it automatically.

Frequently Asked Questions

Can I reset my Galaxy if I forgot my PIN or password?

If you forgot your lock screen PIN, pattern, or password, you cannot reset the phone through Settings — the phone requires you to enter it first. You will need to sign into your Samsung account or Google account on the phone's lock screen to unlock it, or contact Samsung support for help. If the phone is completely unresponsive, you can try the recovery menu reset, but you will still need the PIN to confirm it.

Will a factory reset remove viruses or malware?

A factory reset will remove most malware because it deletes all apps and files. However, if malware is stored in the phone's firmware (the core software that runs the phone), a factory reset may not remove it. If you suspect a serious infection, contact Samsung support or take the phone to a repair shop after the reset.

How long does a factory reset take?

Most factory resets take 5 to 15 minutes from start to finish, including the time the phone spends restarting. If your phone has a lot of data or a slow processor, it may take up to 30 minutes. Do not turn off the phone during this time.

Can I undo a factory reset?

No, a factory reset cannot be undone. Once it completes, all data is erased permanently. You can only restore data that you backed up before the reset. If you backed up to your Samsung account or Google account, you can sign back in after the reset and restore your contacts, messages, and some app data.

What is the difference between resetting all settings and factory data reset?

Reset all settings clears your Wi-Fi passwords, display settings, sound settings, and other preferences, but leaves your apps, photos, and files in place. Factory data reset erases everything — apps, photos, messages, files, and settings — and returns the phone to its original state. Use reset all settings if you only want to fix a settings problem. Use factory data reset if you are selling the phone or want a complete wipe.