how to use dPMR radio SMS function?

https://www.youtube.com/watch?v=kHVTyjiVXvY

Power on dPMR radio DR880, 

In Digital Channel, press menu, find message shortcut, write SMS, fulfill the content

send or send and save. choose your contact, send out your message, your contact will receive your SMS.

that is all, is it so easy? anybody not yet try this function, have a try and you will see the fun.