By default, all SIM card provided by unifi does not require a SIM PIN check, hence there is no code to enter. However, if you wish to set up a new SIM PIN, you will have to enter “1234” as your old SIM PIN. You have 3 attempts before your SIM card is blocked. If you SIM card is blocked, you can login to your Self-Care account browse to Subscriptions page to find your PUK (Personal Unblocking Key). Just enter this number when requested.