What a factory reset does and when you need one

A factory reset erases everything on your Samsung Galaxy S7 and returns it to the state it left the factory — no apps you installed, no photos, no messages, no settings you changed. The operating system stays, but your personal data does not. You would do this if the phone is running slowly, freezing constantly, or you are selling it and want to remove your accounts and files completely.

Before you reset, understand that this cannot be undone. Everything goes. Back up your photos, contacts, and any files you want to keep first — either to a cloud service like Google Drive or Samsung Cloud, or to your computer.

Also know your Google account password. After the reset completes, the phone will ask you to sign in with a Google account to finish setup. If you do not remember the password, you will be locked out of your own phone until you reset it.

Key Takeaways

  • A factory reset deletes all your personal data, apps, photos, and settings, so back up anything you want to keep before starting.
  • You must know your Google account password, because the phone requires you to sign in after the reset finishes.
  • The reset takes about 10 to 15 minutes and you can do it entirely from the Settings menu without a computer.
  • If your phone is frozen and will not open Settings, you can force a reset using the power and volume buttons instead.

Reset through Settings (the normal way)

If your phone is working well enough to navigate the menu, this is the simplest path. Open Settings, then tap Accounts. You will see your Google account listed — tap it, then tap the three dots in the top right corner and select Remove account. Do this for every account on the phone. This step prevents you from being locked out after the reset.

Go back to Settings and scroll down to System. Tap Reset options, then Erase all data (factory reset). The phone will ask you to confirm — read the warning, then tap Reset phone. It will restart and begin erasing. This takes 10 to 15 minutes. Do not turn off the phone during this time.

When it finishes, you will see the setup screen. Connect to Wi-Fi, then sign in with your Google account. The phone will restore your contacts, calendar, and some app data from Google's backup — but not the apps themselves or your photos. You will need to reinstall apps from the Google Play Store.

Force reset using buttons (if the phone is frozen)

If your S7 is completely frozen and will not respond to touches, you can force a reset without opening Settings. Hold down the Power button and the Volume Down button at the same time for about 10 seconds. The phone will vibrate and show the Samsung logo, then the recovery menu will appear.

Use the Volume Down button to highlight Wipe data/factory reset, then press the Power button to select it. The menu will ask you to confirm — highlight Yes and press Power again. The phone will erase and restart. This also takes 10 to 15 minutes.

When the reset finishes, you will see the setup screen again. Sign in with your Google account to restore what you can. Note that this method does not remove your Google account beforehand, so you may see a lock screen asking for your Google password before you can use the phone — this is normal and expected.

What to do before you reset

Back up your photos and videos first. Open the Google Photos app, tap your profile picture in the top right, go to Photos settings, then Backup and sync, and turn it on. Let it finish uploading — this may take an hour or more depending on how many photos you have. After the reset, sign in with the same Google account and your photos will reappear.

For contacts, open Contacts, tap the three lines in the top left, then Settings, then Export. Choose Export to .vcf file and save it to Google Drive or email it to yourself. After the reset, you can import it back in the same menu.

If you use Samsung Cloud instead, open Settings, tap Accounts, then Samsung account. Tap Cloud and make sure Sync is turned on. Samsung Cloud backs up contacts, messages, and some settings — after the reset, sign in with your Samsung account and tap Restore.

After the reset: what comes back and what does not

Google restores your contacts, calendar events, Gmail, and some app data like game progress if the app developer saved it. It does not restore the apps themselves — you will see an empty home screen and will need to open the Google Play Store and reinstall what you want.

Photos and videos do not come back unless you backed them up to Google Photos or another cloud service. Text messages and call history do not come back. Any files you saved to the phone's storage are gone. Passwords you saved in Chrome will come back if you signed in with your Google account.

If you backed up to Samsung Cloud, sign in with your Samsung account in Settings and tap Restore to bring back contacts, messages, and settings that Samsung Cloud saved.

Troubleshooting a stuck reset

If the phone gets stuck on the Samsung logo or the setup screen during a reset, it is usually because the battery died. Plug it in and wait 30 minutes, then try again. If it is still stuck, hold Power and Volume Down for 10 seconds to restart it.

If you see a message saying "Unfortunately, the process had an error" or the phone keeps restarting, try the force reset method using the buttons instead of Settings. If that also fails, the phone may have a hardware problem and you should contact Samsung support or visit a repair shop.

If you are locked out after the reset and cannot remember your Google password, go to accounts.google.com on a computer, click Sign in, then Forgot password? and follow the steps to reset it. Once you have the new password, sign in on the phone.

Frequently Asked Questions

Will a factory reset remove my Google account lock?

No. After the reset, the phone requires you to sign in with the Google account that was on it before. This is a security feature to prevent theft. If you do not remember the password, you will need to reset it at accounts.google.com on a computer first.

Can I stop a factory reset once it starts?

No. Once you confirm the reset, it cannot be stopped or reversed. The phone will erase your data and restart. Do not turn off the phone during this time — let it finish, even if it takes 15 minutes.

Do I need a computer to factory reset my S7?

No. You can reset entirely from the phone's Settings menu or using the button combination. A computer is only useful if you want to back up files beforehand or if you need to reset your Google password afterward.

What happens to my SD card during a factory reset?

The factory reset erases only the phone's internal storage, not an SD card. Files on the SD card stay. However, some apps store data on the internal storage even if you moved the app itself to the card, so those files will be erased.

Can I factory reset my S7 without knowing the password?

You can perform the reset itself without a password using the button method. However, after the reset finishes, the phone will lock you out and ask for the Google account password. You will need to reset that password on a computer before you can use the phone again.