iPhone reset,do you use it correctly?

Reset All Settings

Restoring your device to default settings helps when the device crashes and resets itself or when apps freeze/hang or reset the device.

The following are restored to default values (personal data is not affected):
• Ringtones
• Sound settings
• Display settings
• Network settings (Cellular and Wi-Fi settings)

Reset keyboard dictionary

The keyboard dictionary on your iPhone or iPad should now be reset to default. Any funny spelling mistakes it was making should now be remedied.

Reset network settings

If you see No Service or Searching on your iPhone(Wi-Fi + Cellular), or can't connect to a cellular network or cellular data. You can use this way.

This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before.

Reset home screen layout

Not only will this restore the iOS home screen to its default icon arrangement, but it also has the added benefit of removing every app that is contained within a folder and placing them back onto the Home Screen of the device, effectively removing those folders in the process.

Reset location & privacy

Privacy controls in iOS 8 and later give you control over which apps have access to information stored on your iOS device. For example, you can allow a social-networking app to use your camera, allowing you to take and upload pictures. You can also grant access to your contacts, so a messaging app can find any friends that are already using the same app.

You can modify privacy settings in Settings > Privacy. You can select a type of data from this list to see which apps have asked for permission to use that data. An app won't appear on the list until it asks permission to use your data. You can add or remove permission from any app that has asked for access to data. An app can use your data only if you have given it your permission.