Telco operators caution public about new wave of scam messages

The Philippine Chamber of Telecommunications Operators (PCTO) has voiced concerns regarding a new wave of scam messages targeting mobile users through methods outside traditional telecommunications networks. 

The organization has called for enhanced collaboration among industry players, government agencies, and stakeholders to address the growing issue effectively.

“This new wave of scam messages is worrisome as fraudsters have resorted to methods that do not pass through telco networks, thus they can evade our already robust filters,” said Atty. Froilan Castelo, president of PCTO and general counsel at Globe.

He emphasized the need for a united front to combat the common enemy of scammers.

The rise in off-network scam messages comes as telcos have strengthened security measures against scams and spam SMS. Globe began blocking all person-to-person SMS with links in September 2022 and later extended this restriction to app-to-person SMS. However, fraudsters have adapted by using over-the-top media services, chat apps, Rich Communication Services (RCS) for Android users, and other Internet-based messaging platforms to bypass these measures.

Evading telco security measures

Fraudsters are also employing International Mobile Subscriber Identity (IMSI) catchers or fake cell towers to target mobile users within specific areas. These devices mimic cell towers to intercept communications, allowing fraudsters to send messages using imitated sender IDs, including those of official accounts. This technique, known as spoofing, is challenging for mobile users to detect and often leads victims to malicious websites through deceptive links.

In response, telcos like Globe have ceased using clickable links in official advisories and have repeatedly urged customers to remain vigilant. The industry is collaborating with authorities to tackle spoofing, including efforts to prevent the importation of spoofing devices.

PCTO’s renewed call for vigilance underscores the critical role of public awareness in combating these scams.

 “At the end of the day, the first line of defense for mobile users is themselves. Be vigilant and discerning against messages from unknown numbers, and never click on any link inside unsolicited messages,” Castelo advised.