Mobile phones can only send text messages, not photos. What is the reason?

The mobile phone is always disconnected in flight mode. When the mobile phone is in flight mode, it can be disconnected from the network and disconnected from the network signal without turning it off, and it can't make phone calls, send text messages or surf the Internet. You can listen to music and play games ... mobile phone flight mode saves electricity than switching on and off, and supports alarm. Mobile phones often switch too much power, and n programs need to be restarted. It is best to switch to flight mode during rest. Switch to flight mode and support alarm. The flight mode is mainly to prevent network signal interference in airports, gas stations, hospitals and other places. Choosing flight mode can disconnect the network and signal without turning off the phone, and you can't make phone calls, send text messages or surf the Internet. You can listen to music and play games. ...