If the message is “PIN unlock key (PUK)” or "Enter PUK Your SIM Card, SIM cannot be accessed" or on an iPhone's status bar showing "Locked SIM" open message support here: https://productioncommunity.publicmobile.ca/t5/notes/composepage/note-to-user-id/22437 **Monitor your Community inbox (envelope icon on the top right) after the ticket is opened. CS Agent will reply to you there.