Click on i Tunes in the menu bar and then click on “Check for updates.” Once i Tunes is all squared away, it’s time to turn your attention to your i OS device and follow these instructions: Step 1: Connect your i OS device to your computer using an USB cable.Wait for i Tunes to open and connect to your device.
Read the tips below for Upgrading your existing jailbroken i Phone with Cydia installed to new i OS 9 – i OS 9.1 firmware .
Also, these jailbreaks actually disable OTA updates so that the device does not accidentally update itself to the next i OS firmware, thus saving the jailbreak.
So if you want to update your jailbroken device to i OS 9 , your only way to do it is through i Tunes.
If you’ve a jailbroken i Phone, i Pad or i Pod touch, and trying to update it to i OS 8 using OTA update, then you are probably seeing the “Checking for Update” screen as you can see above.
The issue is expected behaviour with jailbroken devices, as most modern jailbreaks like evasi0n and Pangu disable OTA updates to ensure jailbreakers don’t accidentally install the update.