So Your Jailbroken iPhone is stuck at the Apple Logo, and will not boot any further. How to fix this? The more common method is plugging in the device into iTunes, and restoring it to either a previous backup or to default settings. But, many people get iTunes errors and cannot sync their Device with iTunes. Luckily, there is a much easier way to fix the "Boot Loop".
** Update 8/27/16- This Method still works for iOS 9.0 -9.3.3 Please note that at this time a Jailbreak for iOS 9.3.4-9.3.5 has not been released.
** Update 4/29/15 - This method works with the iPhone 6 running iOS 8.1.2. This video was made to help users that might have installed a tweak that was causing a conflict when booting, but this works with non-jailbroken devices as well!
**Confirmed** This method Works with iPhone 5 running iOS 6.0
** As long as you have mobile substrate 0.9.3997 or higher, this method should work. If you have recently used Cydia, chances are that you have a higher version, as this was released in mid 2012.
How to do it?
Step 1) Hold both the Home Button (The Button below your Screen with the Square inside of it) and the Sleep Button (Button above your Camera) for about 7-10 seconds. This will force your iPhone to Reset.
2) If you iPhone is charging, then it will restart by itself once the screen goes black. If it isn't charging , then you have to power on your Device.
3) When it powers on, you should see the Apple Logo. As soon as you the Logo, you have to Press and Hold the Volume UP Button (+)
4) Continue Holding and don't let go. It might be quick for some devices, it might be longer for others. It took me almost 5 minutes the first time I tried this, and I was about to give up, when it powered on.
5) Once your Device boots up, all your Cydia Tweaks will be disabled, and you will be able to go into Cydia, and remove the Package that is causing you problems. It is possible that the Package you recently installed is not compatible with your iPhone/OS, so try to uninstall the most recent one.
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