When the smartphone logs into QQ (v4.7.2.2 180 or above), my information (key points) and personalized signature, swipe the signature you want to delete with your finger-from right to left (key points), it will be deleted, and then click. It's good. If you don't understand, I'll say it again 1. Log in to the smartphone QQ (mine is Android). Click "I" in the lower right corner. Click on the line of your vest (there is a personalized signature column on this page, don't click). 4 my personal data. 5 personality signature (if you can't see yourself, write another one in the vest column). Slide your finger from right to left to delete the signature line.