Where is the greeting function of Huawei mobile phone to each city?

As long as your mobile phone roams to their server, the telecom or mobile company will send it automatically.

The subject should also be experienced. When the plane is turned on after landing, it will receive greetings from the operator. Welcome to a place. This is when the system finds that your mobile phone has changed the registered local network, and the greeting system monitors the registered information of this changed local network, thus triggering the greeting message. Here we only need to monitor HLR signaling, and the greeting information is at the city level, which is not suitable for such a small area of the company building.

If the signaling collected by the operator is more detailed and complete, and can monitor the signaling between the base station and the core network, then the mobile phone can also monitor when switching between the base stations, and the greeting system can send short messages. Due to a lot of signaling to be monitored, the processing capacity of the monitoring system is relatively high, and the investment of the whole system is also relatively large. Operators may not invest in building this system.

In addition, there are privacy issues. Some users don't like their whereabouts being known, and they will complain that this greeting information is too accurate.

You can ask whether the local operator provides this service. Of course, you have to apply to three operators separately to cover all users.

In fact, in the 2G era, there is a business called "community broadcasting", which is just suitable for your company's needs. As soon as users enter the community covering your company building, they will receive greetings from the base station. Unfortunately, there are not many users of this service, and now it has basically stopped.

If P.S. recommends a pseudo base station, it can be dragged out and leveled. First, it is illegal to install pseudo base stations; Secondly, it is only valid for GSM users. At present, most users use 3G and 4G mobile phones, and pseudo base stations are not acceptable (but China Mobile currently adopts the strategy of single card and dual standby, that is, mobile phones receive 4G and 2G signals at the same time, so even the 4G users of China Mobile will still be interfered by pseudo base stations, but J telecom users and 3/4G users of China Unicom will not have this problem); Finally, the pseudo base station interferes with the normal use of users. When the user arrives at your company building, he can't make a phone call and probably won't come next time.