Why do some text messages received by my mobile phone have the letter EMS behind them?

EMS is a short message between mms (multimedia message) and sms (plain text message). The charging standard is sms, and most of them have built-in menus in early mobile phones of Samsung, Siemens and Philips.

As for where it exists, it is automatically saved after your mobile phone judges. If there is no option for you to exist there, you can only save it like this by default.