If the wrong PIN is entered three times in a row, your SIM is blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting Customer Service. Please note: If the wrong PUK is entered ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from Telstra.
Select general settings
Press the required language.
Press the required country or area.
Select setup method
Follow the instructions on the screen to transfer content from another iOS 11 device or press Set Up Manually.
Select Wi-Fi network
Press the required Wi-Fi network.
Key in the password for the Wi-Fi network and press Join.
If there are no available Wi-Fi networks, you can use the mobile network instead.
Turn use of Touch ID on or off
Follow the instructions on the screen to turn on use of Touch ID or press Set Up Touch ID Later.