Can you send a text message to the person who built the plane? Why?

Can't send, also can't play! China's national civil aviation regulations stipulate that it is strictly forbidden to use mobile phones during the whole flight. Reason: The mobile phone not only emits electromagnetic signals when dialing or answering, but also keeps in touch with the ground base station in standby state. Although the signal transmission time is short, it has strong continuity. When the plane flies smoothly, it is 6000m to12000m above the ground. At this time, the mobile phone can't receive the signal at all and can't be used. It is possible for the mobile phone to get in touch with the ground base station during takeoff and landing, but the consequences of interfering with the navigation system at this time are the most serious. On the plane, these electronic devices in use will interfere with the communication, navigation and control system of the plane, and will interfere with the wireless signal connection between the plane and the ground, especially when the plane takes off and lands.