When the phone is in airplane mode, it turns off all wireless signals, including cellular, Bluetooth and Wi-Fi. When you turn on Wi-Fi, the phone will turn on the Wi-Fi module, but there is no network connection at this time. As a result, the phone is constantly searching for Wi-Fi signals around it in an attempt to establish a connection.
Such searches drain the phone's power and performance, but also increase the phone's heat, potentially causing damage to the phone's components. Therefore, using this method for a long time may cause certain damage and risk to the mobile phone.
It won't make any difference. The flight mode of the mobile phone is also called the aviation mode, which is that the mobile phone must be turned off when taking the plane, so as to avoid the transmission and reception of the mobile phone signal affecting the flight of the plane, and some mobile phones come with this function, which can turn off the signal transceiver device of the SIM card