Turn on the iPhone by pressing and holding the side button
Follow the on-screen setup steps
Choose your language and region
Connect to a Wi-Fi network or cellular network
Activate with your Apple ID if prompted
Insert and activate a SIM card if needed
Restore from iCloud backup, Mac, or PC if desired
Set up Face ID or Touch ID
Create a passcode
Agree to the terms and conditions
Complete the setup and wait for activation to finish