4 It Makes Upgrading Complicated
It is more difficult to upgrade your iOS on a jailbroken device than on your standard iPhone, as you won’t be able to do it untethered. If you visit the Software Update section, your device will simply keep loading the “Checking for Software Update…” screen. Instead, you will have to use iTunes in order to upgrade.
Also, if you want to upgrade your device to the latest iOS, you will lose all of the jailbreaking functions, apps, and shortcuts you installed.
There is also a chance that, in the process of upgrading your iOS, you’ll make your device inoperable. This is because jailbreaking a device could change and remove parts of the OS crucial for updating and upgrading the iOS.