Back up your current iPhone if needed
Connect to Wi-Fi
Open Settings
Tap General
Tap Transfer or Reset iPhone
Tap Erase All Content and Settings
Follow the onscreen prompts
Restart the iPhone
Select your language and region
Connect to Wi-Fi
Sign in with your Apple ID
Tap Restore from iCloud Backup
Choose the backup you want to restore
Keep the iPhone connected to Wi-Fi and power
Wait for the restore to finish
Open apps to complete downloads
Connect your iPhone to a Mac or PC
Open Finder on Mac or iTunes on PC
Select your iPhone
Click Restore Backup
Choose the backup you want to restore
Enter the backup password if encrypted
Click Restore
Keep the iPhone connected until the restore finishes