Where is the vibration mode of Jin Li's old mobile phone?

Old mobile phones have fewer functions. You can turn on your mobile phone and a menu bar will appear. Then you can find the settings, and then you can find the ringing modes in the settings, including ringing, vibration and mute modes. Then this vibration mode is in the settings.

Because there will be vibration mode in some silent occasions, mobile phone users can adjust their mobile phones to vibration mode. In this mode, there is no ringtone prompt, only vibration prompt. So as to prompt the user that there is a message or a phone call.