Developers have been testing the Beta iOS 5 from Friday (24). Apple released the software in the middle of a weekend, probably forever for geeks alone had something to do. And as day follows, begin to show new features the company's apple to iOS. The latest discovery shows that you can not perform drowngrade to a previous version of firmware.
There is a whole technical explanation for this change, you can read on Ars Technica. In short, the routine "APTicket" may be necessary to authenticate the device during boot. As only Apple has the device's encryption key, that story would install an earlier version of the IOS. That is, once in iOS 5, the user would have to stay with this version of the system (and subsequent updates) forever.
But who would want to put a iOS old iPhone, iPad, or iPod Touch? I wanted to. My iPod Touch is an old, second generation. In the recent firmware updates, before quitting to launch Apple IOS versions for my music player, I noticed that the device's performance fell. Using iTunes and file an original firmware, I could easily do the drowngrade, a process that is not possible in iOS Beta 5.
Restrictions are likely to have to do with sending updates iCloud and wireless (OTA)
This change in "APTicket" can also affect users who jailbreak wireless. The procedure can be blocked, as well as the downgrade. The Jailbreak wired will continue in effect, according to those responsible for the Dev-Team, a group that creates solutions to circumvent the security of the IOS.
Ars Technica points out rightly that this restriction applies to the latest Beta of IOS, but there is no guarantee that Apple will adopt it in the final iOS 5.
