What formatting a Samsung phone means and when to do it

Formatting a Samsung phone means erasing everything on it — all apps, photos, messages, contacts, settings — and returning it to the state it was in when it left the factory. The phone itself stays the same; only the data inside gets wiped. You might do this before selling the phone, giving it away, or if the phone has become slow or glitchy and you want a clean start.

Samsung calls this a "factory reset" or "factory data reset". It is different from straightforward deleting files or clearing the cache. A format wipes the entire storage partition, so recovery is difficult once it is done. Before you start, back up anything you want to keep — photos, contacts, messages, app data — because formatting removes it all.

Key Takeaways

  • Formatting erases all data on your Samsung phone and returns it to factory settings, so back up anything you want to keep first.
  • You can format through Settings > General Management > Reset > Factory Data Reset, or through the recovery menu if the phone will not start normally.
  • The process takes 5 to 15 minutes and the phone will restart several times on its own.
  • After formatting, you will need to set up the phone again, including signing into your Samsung account and Google account.
  • If you forget your Samsung or Google password, you may not be able to use the phone after formatting, so verify your passwords first.

Back up your data before you format

Once you format, the data is gone. Samsung phones can back up to Samsung Cloud, Google Drive, or your computer. The fastest method is usually Samsung Cloud if you have a Samsung account, because it backs up contacts, messages, calendar events, and some app data automatically.

To back up through Samsung Cloud, go to Settings > Accounts and Backup > Samsung Cloud and tap Backup. Choose what you want to save — typically Contacts, Messages, Calendar, and Apps. Photos and videos usually go to Google Photos instead, which you can set up in the Google Photos app. If you use a computer, you can also connect the phone via USB and copy files manually to your hard drive.

Write down or save your Samsung account password and your Google account password in a safe place. You will need both after the format to sign back in.

Format through Settings on a phone that starts normally

If your Samsung phone turns on and responds normally, this is the easiest route. Open Settings and scroll down to find General Management (on some older Samsung phones it may be called System or About Phone). Tap General Management, then look for Reset or Reset Options.

Tap Factory Data Reset or Factory Reset. The phone will show you a summary of what will be erased and ask you to confirm. Read it carefully — this is your final note to back out. If you are ready, tap Reset or Delete All. The phone will ask for your PIN, pattern, or password to confirm you are the owner. Enter it.

The phone will restart and begin the format process. You will see a progress bar or spinning icon. Do not turn off the phone or remove the battery. The process usually takes 5 to 15 minutes. The phone may restart several times on its own — this is normal. When it finishes, you will see the initial setup screen, the same one you saw when the phone was brand new.

Format through recovery mode if the phone will not start

If your Samsung phone will not turn on, is stuck in a loop, or will not respond to touch, you can format it through the recovery menu. This requires using physical buttons instead of the screen.

Turn off the phone completely. Then hold down the Power button and the Volume Up button at the same time. Keep holding both buttons until the Samsung logo appears — this usually takes 5 to 10 seconds. You may see "Downloading" or a progress bar; keep holding. When the recovery menu appears (a black screen with white text and options), release the buttons.

Use the Volume Down button to scroll to "Wipe data / factory reset" or "Factory data reset". Press the Power button to select it. The menu will ask you to confirm. Scroll to "Yes" using Volume Down and press Power to confirm. The phone will format. Do not interrupt it. When it finishes, you will see "Reboot system now" highlighted. Press Power to restart the phone.

Set up your phone after formatting

When the phone restarts after formatting, you will see the Welcome screen or "Hi there" message. Follow the on-screen steps to choose your language, connect to Wi-Fi, and sign into your accounts. You will be asked to sign into your Google account first — use the same email and password you used before.

Next, you will be asked to sign into your Samsung account. Use the same Samsung account you backed up to. If you do this, the phone will restore your contacts, messages, calendar, and other backed-up data automatically. This may take a few minutes depending on how much data you backed up.

After that, you can reinstall your apps. If you backed up your apps through Samsung Cloud or Google Play, they may reinstall automatically. Otherwise, open the Google Play Store and search for each app you want, then tap Install. Your phone is now formatted and set up fresh.

What to do if you are locked out after formatting

Some Samsung phones have a security feature called Reactivation Lock. If you format the phone but do not sign back into the Samsung account that was on it before, the phone will ask for that account's password and will not let you use the phone until you provide it. This is a theft-prevention feature.

If this happens to you, you have two options. If you remember the password, sign in with it. If you do not remember it, go to the Samsung account website on a computer, click "Forgot password?", and follow the steps to reset it. Then use the new password on the phone. If you cannot recover the account, you may need to contact Samsung support with proof of ownership.

Formatting versus other ways to clear your phone

A factory reset is different from clearing your cache or clearing storage space. Clearing the cache (Settings > Apps > [App name] > Storage > Clear Cache) removes temporary files but keeps your data. Clearing storage space (Settings > Storage) lets you delete individual files or apps. Neither of these is a format.

If your phone is slow, try clearing the cache first. If it is full, delete old photos and videos or uninstall apps you do not use. A format should be your last step, not your first, because it erases everything. Use it only when you are sure you want a completely clean phone.

Frequently Asked Questions

Can I stop a format once it has started?

No. Once the format process begins, do not turn off the phone or remove the battery. The process is designed to complete without interruption. If you interrupt it, the phone may become unusable. Let it finish, even if it takes longer than expected.

Will formatting remove my Samsung account from the phone?

Yes. Formatting removes all accounts, including your Samsung account and Google account. After formatting, you will need to sign back in. If you do not sign back into your Samsung account, Reactivation Lock may prevent you from using the phone.

What if I forgot my Google password before I formatted?

Go to google.com/accounts/recovery on a computer and follow the steps to reset your password. You will need access to a recovery email or phone number linked to your account. Once you reset it, use the new password to sign in on your formatted phone.

Does formatting remove the operating system?

No. Formatting removes your data and settings but leaves the Android operating system and Samsung software in place. The phone will still run the same version of Android it had before.

How long does formatting take?

The format process itself usually takes 5 to 15 minutes. After that, setting up the phone again — signing in, restoring data, and reinstalling apps — can take 30 minutes to an hour depending on your internet speed and how much data you backed up.