How to unblock blacklisted iphone

Hi ​@Fonkeng99 and welcome to Telia Yhteisö! Sorry to hear about your situation. Although I cannot help you much here on this forum, hopefully you get some advice. 

If the phone is blacklisted, it usually means it has been reported lost or stolen and cannot be used on mobile networks. Since the device was purchased from a private seller, I recommend contacting the seller directly.

Operators are only able to remove a device from the blacklist under specific conditions. As the police advised you to contact Telia, we’d be happy to understand more about their recommendation so we can guide you accordingly.

For further assistance, please reach out to our customer service directly.