Jailbreak can lead to malfunctions of iOS 7, as well as regular and third-party applications. Even data loss is possible. Judging by the references to problems with jailbroken devices, such an outcome is indeed possible. However, it should be noted that iOS 7 also works less stable than its predecessor, including on the iPhone 5s and iPad Air. Spontaneous device reboots and crashes of programs, including those adapted for iOS 7 and even full-time (Safari browser) have become much more frequent.
Apple applications are carefully optimized to minimize battery consumption. Third-party programs and tweaks installed via Cydia on jailbreak devices do not differ in such a caring attitude towards the battery. “Hacked” iPhones and iPads can work fine, but no one can guarantee that some applications will spend the charge “in the background”, leaving the user in the afternoon with a fully discharged gadget.
In some cases, unauthorized modifications lead to irreversible changes in the iOS operating system. As a result, when a user puts up-to-date updates on a hacked iPhone or iPad, the gadget may simply stop working. In the latest versions, jailbreak blocks the system of automatic updates, so users of “hacked” iOS devices will not be able to update automatically.
- Problems with regular functions
Installing the jailbreak may have a negative impact on some of the standard functions of the system. For example, there can be problems with push-notifications used for notifications of new mail, messages, husky etc. Sometimes it even happens that the notice intended for a hacked device, transferred to another. Unstable can start work after breaking i-devices and other system services. In addition, there may be problems with communication. Users may encounter dropped calls, slow or unstable data transmission, as well as incorrect or delayed transmission of location data.
Jailbreak reduces the number of levels of protection, use iOS devices to defend against viruses and hacker attacks. Staffing Apple software tested as Apple employees in the process of development and hundreds of millions of people in everyday use, and any "holes" are rapidly becoming known to the public, after which eliminated. Software that is installed after the jailbreak, can contain any malicious code that may be a long time unnoticed. So that the risk of unauthorized access to your data or damage to the device through malicious code after jailbreaking repeatedly increases.
With regard to the question of deprivation of a guarantee, the “hacking” is indeed a violation of the license agreement, since Apple forbids modifying the iPhone and iPad operating system. However, the user, before taking the device to the company, can always restore the factory firmware via iTunes or completely reset the settings through the system menu, returning the gadget to its original state.
Apple's jailbreak stance