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 a jailbreak can adversely affect some of the standard functions of the system. For example, there may be problems with push notifications used for notifications of new mail, messages, likes, etc. Sometimes it even happens that notifications designed for one hacked device are sent to another. Unstable can start to work after breaking i-devices and other system services. In addition, communication problems may occur. Users may experience dropped calls, slow or unstable data transfers, and incorrect or slowed-down location data.
Jailbreak reduces the number of protection levels used by iOS devices to defend against viruses and hacker attacks. Apple full-time software has been tested by both Apple employees during the development process and hundreds of millions of people in everyday use, and any “holes” quickly become public, and then eliminated. The software installed after jailbreaking can contain any malicious code that may go unnoticed for a long time. So the risk of unauthorized access to your information or damage to the device through malicious code after jailbreaking increases many times.
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