I have an iphone 6 64gb running ios 8.2 ,and while i was using itools to transfer song to my device I found a new feature in itools called firmware download I entered the model number then I picked ios 8.1 and it start downloading another feature called firmware flashing was also added so i was wondering if i managed to download ios 8.1 is possible to be flashed on iphone even if apple isn't signing them