The mobile phone receives a local welcome message.

According to your information, you should have a border roaming, which is used in this city, but there are roaming charges in the surrounding cities, because you received the signal of the border roaming place. At present, China Unicom has basically solved the roaming problem in most areas through various methods. However, due to the characteristics of mobile networks, the signals covered by the networks cannot be clearly divided like administrative regions, so this problem cannot be completely avoided from the technical level.

In this case, you can consult your 100 10, and ask the staff to help you verify and handle it.