Samsung Galaxy Tab S4

When the lock code is turned on, it needs to be entered every time you turn on your tablet.

Solution: Turn use of lock code on or off

If your tablet is network locked to Optus and you try to use a SIM from another operator, the screen will tell that your SIM is invalid.

Solution: To use a SIM from another service provider, you'll need to unlock your tablet by visiting the Optus Unlock Your Device page.

You can check if your SIM is faulty by inserting it in another device.

Solution: Contact customer service or find an Optus dealer using our Store Locator.

If your SIM has been permanently blocked, you'll need a new SIM.

Solution: Contact customer service or find an Optus dealer using our Store Locator.

If you key in an incorrect PIN, your tablet can't start.

Solution: Check your PIN is correct.

If your tablet is SIM locked, it needs to unlocked in order to use it with a SIM from another service provider.

Solution: To get the unlock code, contact the service provider.

If you've keyed in an incorrect PIN three times in a row, you need to key in the PUK.

Solution: Please note: if you haven't received a PUK or don't know it, it can be obtained by logging on to Optus My Account.