Updating a jailbroken iphone
The best way to update a jailbroken i Phone is with the help of i My Fone i OS System Recovery.
It is a tool which provides a professional help in installing a new i OS on your device.
If you even try to update your jailbroken i Phone via OTA updates, you would get stuck on the screen that says "Checking for Update", eventually.
Here is the guide on how to update a jailbroken i Phone via i Tunes.
This is quite a long and time consuming process, so it isn't recommended to perform it if you have to rush to some place in sometime.
Step 6 – Make sure your device stay connected with the computer during the whole process.
Also, your device will reboot several times during the process, which is normal. Step 7 – After completion, your device will reboot to a "Hello Screen" and you can proceed to setup your device.