Telstra 4GX USB Modem 2

Click Settings.

Click Management.

Click PIN Management.

Click the drop down list next to "PIN operation:".

Click Modify.

Click the field next to "PIN code:" and key in your current PIN.

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 an incorrect PUK is entered ten times in a row, your SIM is blocked permanently. In this case, you need a new SIM from Telstra.

Click the field next to "New PIN:" and key in a new PIN.

Click the field next to "Confirm PIN:" and key in the new PIN again.

Click Apply.