Specifically, subjects often choose to use digital sims that have not been converted from 3G to 4G and have links with credit cards, bank cards. Then, the object pretending to be the operator's employee calls the victim to notify the change of sim card from 3G to 4G and takes the right to use the SIM, thereby appropriating the money in the person's credit card, bank card. victim.

MobiFone immediately continued to implement more measures to improve the security system, proactively review, ensure storage and confidentiality of customers' personal information.

In particular, MobiFone recommends that all customers raise their alertness and be cautious about unusual messages and calls requiring replacement of sim cards or receiving unexpected offers.

MobiFone subscribers need to:

+ Contact directly with hotline 9090 to verify the information that the contact person is really an employee of MobiFone or not.

+ Do not provide personal information, bank account, PIN, OTP, ...

+ Absolutely do not perform text composing operations with strange syntax.

If customers need to find out about MobiFone's telecommunications services, please contact the operator 9090.