The operators are Grameenphone, Airtel, Banglalink, Robi, CDMA-based Citycell and state-owned Teletalk.
They have been directed to pay the fines to the regulator within 30 days from the date of issuance of the notice.
BTRC said despite repeated warnings Airtel Bangladesh Limited sold some of their SIMs without proper registration.
The telecom regulator on Tuesday fined all six mobile-phone operators around Tk 65 million for selling SIM cards defying rules and regulations.
Complete Story: bdnews24.com