How can I restore my iPhone 6?

How can I restore my iPhone 6?
2 ways to restore iPhone from iCloud

Go to Settings > General > Reset > Tap Erase All Content and Settings;
After your iPhone reboots, connect to Wi-Fi;
When you get to the Apps & Data screen, tap on “Restore from iCloud Backup” > enter your Apple ID and password > choose the backup you need from the list;

2 ways to restore iPhone from iCloud
  1. Go to Settings > General > Reset > Tap Erase All Content and Settings;
  2. After your iPhone reboots, connect to Wi-Fi;
  3. When you get to the Apps & Data screen, tap on “Restore from iCloud Backup” > enter your Apple ID and password > choose the backup you need from the list;