Go to: Settings > Call > Additional settings > Fixed dialing numbers > Change PIN2. The default PIN2 code is 0000, unless you've entered a different PIN2 code. If the wrong PIN2 code is entered three times in a row, the PIN Lock will be automatically activated.
It should be 1234. If your SIM card gets locked, you will need to call Koodo customer service and get the PUK2 code for your SIM card. If you enter your PUK1 or PUK2 wrong ten times, you will need to buy a new SIM card, so don't try to guess that one.