Calling pretending to be a carrier employee to request a SIM upgrade, the bad guy takes control of mobile subscribers to steal OTP code information, then withdraw money from customers’ credit cards or borrow money online.
Scams through SIM upgrade support have flourished recently. A representative of VinaPhone network operator said that in the past time, high-tech scams have increased sharply with sophisticated tricks, in which there has been a situation where fraudsters have appropriated control of mobile subscribers’ SIMs. Steal OTP code information, then withdraw money from customer’s credit card or borrow money online. This carrier recommends that mobile users be wary of calls and messages from unknown numbers with content such as requests for assistance with SIM replacement/SIM upgrade or winning announcements. When there are phenomena like above, customers access the official websites and information channels of the network operator to authenticate or contact the customer service center for answers. When the phone SIM has abnormal signs such as signal loss, disabled for unknown reasons, many strange phone numbers calling in the same time period, etc., customers urgently contact the network operator to check the status of the subscriber and get advice, answers or recommendations on how to handle it. In case the subscriber receives a notice of unusual transactions such as transactions related to credit cards, related online credit loans, customers should immediately contact the banks and financial institutions where the card is issued. Credit card, where the online credit transaction occurs, request emergency card locking support to prevent fraudsters from appropriating assets or clarifying that online credit transaction. In addition, the network operator recommends that users do not access the links attached to the content of strange messages; do not perform operations on the phone according to the syntax instructed by strangers. When there is a need to change / change a new SIM, go directly to the transaction points or the official agent of the carrier to do it. VinaPhone said that it has added surveillance cameras at transaction points to prevent bad behavior and widely communicated on internal channels as well as mass media for customers to capture information and be vigilant. against scams. Previously, the authorities also warned about fraud to appropriate the right to use the sim and then borrow money online. Many cases after upgrading the sim suddenly become a debtor of several million to several tens of millions of dong.
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