Several telecommunications companies in Australia have been found to have breached regulations by allowing SMS scams to be transmitted through their networks. The Australian Communications and Media Authority (ACMA) has identified these breaches following an investigation into the issue. The ACMA found that the telcos failed to implement adequate measures to protect consumers from fraudulent SMS messages, leading to an increase in scam activities. As a result, the ACMA has taken enforcement action against the companies involved, including issuing formal warnings, imposing penalties, and requiring them to improve their compliance practices. The ACMA's actions highlight the importance of telecom providers taking responsibility for preventing scams and protecting their customers from fraudulent activities.