How to change the key tone of Apple's 6s SMS?

1 Go to "Settings" of the mobile phone and click Enter.

Then let's go to the "sound" option of the mobile phone.

3. Then we will have a "keystroke sound" option in the sound page.

4. Then use "keystroke" to turn it off and on again.

5. After this setting, it will be sent. If it still doesn't work, we can try to hold down the "power lock button" on the top of Apple's mobile phone until a sliding shutdown screen appears, and then slide it to turn it off.

6. Just open it later.