1. First, we open the "Settings" APP in the mobile phone;
2. Next, we click "All Settings" in the upper right corner of the page;
3. At this time, we click "Lock Screen and Password" on the page;
4. We will click "Lock Screen Signature" on the lock screen and password page;
5. Then, we click the lock screen interface that displays the added information;
6. Just enter the signature displayed on the page.