Device Guides

Samsung Galaxy S20 Ultra 5G

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I can't turn on my mobile phone

This troubleshooting guide will take you through a number of possible causes to help you find a solution to your problem.

Possible cause 2:

Your mobile phone doesn't turn on correctly: See how to turn on your mobile phone.

List view

1. Turn on your mobile phone

Tap and hold the Side key until your mobile phone is turned on.

2. Enter PIN

If you're asked to key in your PIN, do so and tap OK. The default PIN is 0000.
If an incorrect PIN is entered three times in a row, your SIM will be 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 an incorrect PUK is entered ten times in a row, your SIM is blocked permanently. In this case, you'll need a new SIM from Optus.
0000

3. Turn off your mobile phone

Slide two fingers downwards starting from the top the screen.
Tap the power off icon.
Tap Power off.
Tap Power off.
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