Carriers guide how not to be misappropriated SIM-Information Technology

Recently, there have been quite a few people complaining about losing money in their bank accounts, e-wallets… after following the instructions on how to change 4G SIM cards of strangers.

Beware of call diverting tricks

Accordingly, crooks will impersonate as customer care staff of carriers, banks, e-wallets… and ask users to follow the instructions to change 4G SIM or fix related problems regarding the phone.

Specifically, the crook will ask you to enter **21*# (according to the USSD protocol). In essence, this is a call diverting feature, allowing mobile subscribers to divert calls to another phone number.

When a successful call transfer order is made according to the instructions of the scammer, your subscriber will still have signal, receive messages or access the network normally, but all incoming calls will be redirected to the phone number of the scammer. Scammers.

After taking over the right to receive calls, the crooks will log into the victim’s e-wallet, social network account, bank, etc. and declare that they forgot the password. From there, they easily get money in wallets and bank accounts.

Besides, VinaPhone also recommends that users should be careful with the trick of exchanging free 4G SIM cards. The operator staff will contact and go directly to the user’s address, do not change the SIM remotely via phone or any other online form.

Network operators guide how not to be scammed online

– Beware of scam calls, do not execute **21*# code as instructed.

– When the phone shows abnormal signs such as not receiving an incoming call (with a call forwarding icon next to the carrier logo), the user should immediately cancel the call divert feature or contact the operator. for assistance.

What is Call Forwarding?

Call forwarding is a feature that allows users to actively transfer incoming calls to an additional phone number, or a relative’s phone number in case you are busy and cannot answer the call.

Call forwarding can be registered with the USSD code or texted to 1378 (expected to be done from April 2022). However, users need to understand the utility and only transfer calls to trusted phone numbers, absolutely do not transfer calls to unknown, unknown numbers to avoid being taken advantage of and scammed by crooks.

How to subscribe or cancel call divert feature. Photo: Tieu MINH