Sim Lock code

[Schizophonic]

Hi, I wish to put a lock on my sim card (upon startup of my Android mobile and NOT unlocking carrier handset) however when I go into my phone settings and into the relevant menu option it asked me to enter my pin for the sim card.  I tried a few possible known pins both which did not work.  I have one attempt left and don't really want to risk it.

How or what's the best way to either recover the code or somehow reset it?  Order a sim card replacement?  Will that work or is it somehow linked to the handset no matter what sim card I possibly use?  

[Enlli · Accepted solution]

The default pin is usually 0000

If you enter the sim pin incorrectly 3 times you will then need your PUK. Enter the PUK and it will ask you to set up a new pin.

[Schizophonic]

This has worked.  Thank you.  

Its in response to 

https://www.bbc.co.uk/news/uk-england-london-62767659

Someone tried this and its worked.

I just did it without biometric unlock.

- Get a new device, (presumably thieves), pop the nicked phone's sms in it

- Download the santander app

- "Forgot my personal ID"

- use the details from the driving license + full card number to get your personal id

- "Forgot my password"

- use the details from the card number to reset the password

- receive the 2fa sms now you have the sim card,

- set the new password and log in