1, signal cross coverage. Nowadays, in order to enhance the signal and improve the communication quality, many operators will carry out signal cross coverage in two adjacent cities, which means that everyone's mobile phone may be connected to the local signal tower or the signal tower in the adjacent city. If it is connected to the signal tower of the corresponding city, it may be located in an adjacent city.
2. System error. Judging from the feedback from many netizens, there are not many anomalies really caused by signal crossover. For example, some people are clearly in Shenzhen and have never been out of Shenzhen, but the itinerary code is in Inner Mongolia, which is caused by a system error.