48 support will not call you - all support is done online by the customer contacting them first.
What unlocking SIM code are you looking for?
If it's the SIM lock PIN then see here:
https://community.48.ie/t5/The-Knowledgebase/I-forgot-my-PIN-or-need-my-PUK/ta-p/256
If it's a PIN to unlock a phone that is currently locked to another mobile phone provider then you need to contact them about this.
https://48.ie/unlock-your-phone
Hope this helps.
