How can I make Apple SMS louder?

That apple can be broken open. After jailbreaking, there will be multiple cydia applications, and you can download things (as long as there is a software source). One of them is to increase the volume (you can search it yourself), but it is not good for the battery after a long time, so I used it. . . . Suggestion: Although the jailbreak is more powerful, the overall performance of the machine will be slightly slower (if a lot of things are installed). There will be too many batteries, so be careful!