Debug iOS 32 Bits devices

Hello,

we have the following problem: We receive user complaints that our game no longer works on an iPhone 4 and crashes upon startup with the latest update. From our settings it should work, we set minimum OS version to 7.0 and deliver with Air 22.0.0.153.

I tried to download and install the app from the appstore on our iPhone 4, but after clicking Install in the appstore, it just loads a bit and then resets the button to "Install", so I can not install the app on the iPhone 4 for an unknown reason.

Now I would like to debug the whole thing, remove some ANEs for testing etc. But this is not possible with a 32 bits device, am I correct? Is there any way to get a debug or adhoc build running on an iPhone 4 with Air 22 or later?

Thanks in advance