Set the signature: click Settings-General-Keyboard-Add a new phrase-(your name) and then click: Enter the code-just enter two easy-to-remember letters. -Last point: storage. It's over. For example, I want to send my phrase (unit: XXXX, name: XXXX, email address: XXXX) to the other party. The input code is KK. After writing the theme, you can start a new line. Just enter KK, and then click Space to create it.

It takes seven days to sign, and after seven days, the signature can be deleted. The signature of Apple's mobile phone can't be deleted automatically after a few days, but you still need to set it yourself.