Can't 4g messages be sniffed?

No, it is possible that the 4g message was detected by sniffing. (Content from Resources)

SMS sniffing is a new criminal means of pseudo base stations in recent two years. Generally, the technology of "GSM hijacking+SMS sniffing" is adopted. Through some special equipment, the number and owner information of nearby mobile phones can be collected, so as to obtain the verification short message received by the target mobile phone without touching the target mobile phone.

Then use the loopholes of major banks, shopping websites and mobile payment apps to realize crimes such as information theft, fund theft and online fraud. This "short message sniffing" technology is generally only aimed at 2G networks, but criminals suppress signals through special equipment or the poor network quality leads to network frequency reduction, and mobile phones may also be stolen in 3G or 4G networks.

Matters needing attention in expanding data

First, if you find that the mobile phone receives a verification code of unknown origin, you can immediately turn it off or turn on the flight mode, and the mobile location (about a few hundred meters in the urban area) leaves the coverage of the pseudo base station signal.

Second, pay attention to the sudden change of your mobile phone network signal mode. When the mobile phone is connected to a stable 4G network, when the network signal suddenly drops or disappears, attention should be paid to changing the network environment in time and reconnecting the real base station.

The third is to turn on the "VoLTE HD Call" function in the phone settings. VoLTE is a data transmission technology, which uses 4G network to realize the simultaneous transmission of data and voice services. At present, mainstream mobile phones support the function of "VoLTE HD calling".

Fourth, when going out, try to avoid using free wireless networks provided by some public places to reduce the probability of mobile phones being sniffed.

CCTV-Beware of "SMS Sniffer" stealing mobile phone information