Many users complain about performance of their iDevices after the jailbreak process. Not always this happened: it depends on the single device. So what are the reasons behind slowly iPhone/iPod/iPad?
First of all, what is the jailbreak?
The jailbreak is a process thanks to the users can overpass some limitations imposed by Apple. In practice, it is possible to install third parts applications on a jailbroken device, and tweaks, add ons, and other similar software. In a specific way, the jailbreak process modifies rules by witch the operating system manages digital firms of applications, deleting the autenticity check. So that the user can install applications without an original digital firm (these applications are called “cracked apps”).
Differences between original iPhone/ jailbroken iPhone
You can recognize a jailbroken iPhone by a single difference: Cydia. This app, created by Saurik, is automatically installed after the jailbreaking process, and it “marks” a jailbroken iPhone from an original one. Thanks to Cydia the user can install whatever he wants on his device, starting from apps (by Installous), tweaks, add ons, themes and so on. Whit a jailbrek, users have total control on their iDevices, because often they modify the operating system itself, thing that is impossible with an original iPhone.
Many users registered a battery drop after jailbreak. Why this happens? The reason is often one: they install too much extensions that modify the mobile substrate. Deamons (processes that run in background) occupy high portions of RAM, consuming the battery. The most common extensions are, for example, SBSettings, SBRotator , Backgrounder and others that modify the classic interface of the iPhone. A solution could be removing one or more of these extensions, in order to free RAM, or installing tweaks that free RAM space, or deactivate some features of the already installed extensions.
Not with all devices the jailbreak provokes a battery drop: devices with higher risks are the older iPod (1G/2G), iPhone (2G/3G) and the first iPad. If you have one of these devices, be careful installing extensions and tweaks, because is more possible that you note a battery drop or a system crash. If you have an iPhone 3Gs/4/4s or an iPod 3G/4G or an iPad 2/new iPad, you can install whatever extensions you want (being careful to not excess on 3Gs/iPod 3G/iPad), because the processor support this kind of work.