The National Broadcasting and Telecommunications Commission (NBTC) has reiterated warnings against the use of one ID card to register for more than five SIM cards, which violates the regulation, as it is ramping up efforts to combat fraudulent online activities and illegal transactions.
In July, the NBTC board resolved to impose hefty punishments for mobile operators that fail to address the problem, with a fine of 1 million baht per day.
Trairat Viriyasirikul, acting secretary-general of the NBTC, said there were many cases where small dealers or distributors registered a lot of SIM cards themselves and these SIM cards later changed hands with other people.
"This is a critical problem for fraudulent online activities, although the regulation has been in effect for years," said Mr Trairat.
All carriers must ensure one ID card is used to apply for no more than five SIM cards, he said.
Operators must strictly ensure dealers do not breach the regulation or they could face hefty fines.
If an individual wants to register more than five SIM cards, they need to contact the carriers' service centres.
An NBTC survey in June discovered many small dealers allow an individual to register more than five SIM cards, said Mr Trairat.
The telecom regulator is also considering forcing existing mobile subscribers who own more than 10 active SIM cards to re-register at mobile operators' service centres as part of the effort to combat online and phone scams.
The move is meant to obstruct offenders who use "mule" bank accounts to commit illegal transactions through mobile banking apps.
Various parties have held meetings several times to find ways to combat online crimes. They include the Digital Economy and Society (DES) Ministry, the NBTC, the Royal Thai Police, the Securities and Exchange Commission, the Bank of Thailand, the Thai Bankers' Association and mobile operators.
Sutisak Tantayotin, deputy secretary-general of the NBTC, said the agency's management panel is considering imposing stricter measures to address mule accounts on mobile platforms.
He said the agency is looking into the possibility of forcing individuals who subscribe a substantial number of SIM cards to re-register.
It may start at those holding 10 or 30 SIM cards and the law governing it is expected to be forwarded to the NBTC board for consideration soon, he said.
The move was partly pushed by the police through the joint discussion, Mr Sutisak said.
If the law is enforced, mobile subscribers who own excessive SIM cards must re-register in the stipulated timeframe, or else they would not be able to make phone calls, he said.
