Is it impossible to send and receive SMS in offline mode of Nokia mobile phone? Then why is there a column of information prompt tone (no bell column) in personalized selection?

The offline mode of the mobile phone is equivalent to the flight mode, that is, the SIM card function is turned off, so that the mobile phone is in a state of not sending and receiving signals, but it will not affect the operation of other functions of the mobile phone. You can choose the message prompt tone, there is no electroacoustic, because you can also use Bluetooth to accept files in offline mode, which is a mobile phone message.