Samsung Galaxy S9+

Press and hold On/Off until your phone is turned on.

If you're asked to key in your PIN, do so and press OK.

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.

Press and hold On/Off until a pop-up menu is displayed.

Press Power off.

Press Power off.