If you are wondering how to turn off SOS mode, try turning on and off the Airplane Mode, restarting your phone, or putting the SIM back in. You can also specify to check for updates from your carrier or reset your network settings if you still have the problem. SOS mode will automatically turn off as soon as your phone is once again connected to an active cell phone network. If none of these apply, getting in touch with the mobile phone company might help to determine what is going wrong.