You need to activate your phone before using it for the first time and after a factory reset. Before you can activate your phone, you need to insert your SIM into your phone.
Press the Home key.
If your SIM is locked, key in your PIN and press OK. The default PIN is 1111.
Press the required language.
Press the required country or area.
Follow the instructions on the screen to transfer content from another iOS 11 device or press Set Up Manually.
Press the required Wi-Fi network.
Key in the password for the Wi-Fi network and press Join.
Press Continue.
Follow the instructions on the screen to turn on use of Touch ID or press Set Up Touch ID Later.
If you turn off the function, press Don't Use.
Press Passcode Options.
Follow the instructions on the screen to turn on use of phone lock code or press Don't Use Passcode.
If you turn off the function, press Don't Use Passcode.
If you've backed up content previously, you can restore the content from an iCloud backup or restore the content from an iTunes backup. You can also transfer content from an Android phone.
Press Set Up as New iPhone and follow the instructions on the screen to finish the activation.