This is also typically the fastest way to update i OS: Installation proceeds on it’s own after i OS 9 has finished downloading, and the device will reboot itself to complete setup of i OS 9, including the option to configure Hey Siri and a 6-digit passcode for locking the device.

Users can also choose to update to i OS 9 by connecting their i Phone, i Pad, or i Pod touch to a computer running a new version of i Tunes and choosing to install the update when it has been detected and prompts the user.

But it's not fully untethered jailbreak or mechanism anyway.

It's the best options to have partial Cydia on your device until untethered jailbreak released.

We have improved our Cydia app and it includes many benefits and features for jailbreak & Cydia lovers.

Meanwhile, alongside i OS 9 was supposed to arrive Watch OS 2.0 for Apple Watch owners, but apparently the Watch OS 2.0 release has been postponed due to a critical bug that was found at the last minute (according to CNBC).

There isn’t an immediately known timeline for Watch OS 2.0 now, but we’ll be sure to post when the final version arrives, which will probably be in another few days. Separately, i Tunes 12.3 as released as well, specifically with i OS 9 support.

Advanced users may wish to update i OS 9 by using an IPSW firmware file.

The following links are pointing to IPSW for i OS 9.0 on Apple servers.Most issues with a failed i OS 9 installation relate to overburdened servers, and waiting a bit usually resolves any download issues.i OS 9 went through a developer beta and public beta process before being released to the general public, meaning that, in theory at least, it should be a well-tested update for compatible i Phone, i Pad, and i Pod touch models.If you see this error message, it’s likely because the Apple download servers are overloaded.Simply wait a few minutes and try again, the download should proceed as usual.So as we are now reaching to the latest i OS version, all the Cydia fans are now looking for information about Cydia i OS 11.2.5 version.