Samsung GALAXY S7 User Manual page 196

Warning: If you reset your Google Account password, it can take
24 hours for the password reset to sync with all devices registered to
the account.
Before resetting your device:
1. Verify that the information you want to keep has transferred to
your storage area.
2. Log in to your Google Account and confirm your user name and
password.
To reset your device:
1. From a Home screen, tap
2. Tap General management > Reset > Factory data reset.
3. Tap Reset device and follow the prompts to perform the reset.
4. When the device restarts, follow the prompts to set up your device.
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