Every time the camera travels, I just get off the plane and get a reminder message from Unicom. What is the function of this information?

When you log in overseas and log in to the roaming network correctly, you will receive a welcome message from China Unicom, including the global service hotline of China Unicom, the way to make calls and send messages, the local voice and data charges and the contact information of the embassy. Please read it carefully and save it. If in doubt, you can also call the toll-free hotline+8618618610010 for consultation.