The mobile phone can't send text messages before and after the plane takes off.

Hello this friend! It should be normal to use a mobile phone on an airplane, whether it is to make a phone call or send a text message, but for the sake of safety, most airlines are not allowed to use a mobile phone on an airplane now, because it will affect flight safety, even before taking off, so a signal has been blocked within a radius of about one kilometer around the airplane. The reason is to prevent the signal of mobile communication from interfering with the signal frequency of the airport control tower. Some airlines are a little looser, and will block signals after take-off and before landing.

In addition, there is generally a high-frequency signal area barrier near the airport, which is the electromagnetic wave barrier generated in the surrounding space when the airport tower is in close contact with the aircraft entering and leaving the port. If the mobile phone signal around the airport is strong and the phone is of high grade, sometimes you can send short messages through the electromagnetic wave barrier, otherwise the mobile phone will not work well. So, I think what you said should be normal. In airports and nearby areas, texting by mobile phone sometimes fails, which is generally not the problem of the mobile phone itself.