Jailbreak ios9 by yourself
Final version of iOS 9 was released by Apple in September and the initial 9.0 released was quickly followed by bug fix update in iOS 9.0.1, then 9.0.2 in late September.
Since the first versions of IOS, geeks find a way to pass trough the iphone's limits.
This hack is called jailbreak, that describe the freedom to do more things with your iphone.
With this guide you will be able to get this freedom by yourself. With jailbreak you could personalize your phone changing icons, changing actions of buttons or increase the volume of the call.