① On the desktop of Redmi K30 mobile phone, find the setting icon of the mobile phone and click Open.

② After entering the setting interface of mobile phone, find the options of information screen and lock screen in the interface, and click Enter.

③ After entering the information screen and screen lock interface of the mobile phone, find the screen lock signature option in the interface and click Open.

(4) After entering the mobile phone lock screen signature setting interface, find the function of displaying signature information on the lock screen page in the interface, and slide the switch on the right side of this function to open it. When the switch turns blue, it means that the function has been successfully turned on.

⑤ After the lock screen display function is turned on successfully, enter your favorite signature in the input box of the interface, and finally click √ in the upper right corner of the interface.

After the lock screen signature of Redmi K30 mobile phone is successfully set, lock the mobile phone, and then wake up the mobile phone screen, so that we can see our lock screen signature in the lock screen interface.