Originally Posted by redbull123
Just wondering for my own interest, gunny.. what does an RUU restore? I thought it was stock hboot, firmware, rom, recovery, etc. (everything basically). Or is it just that it can't downgrade even with an RUU if you are S-ON and would need to wait on a new RUU being released? Unless you're S-off and can superCID, then your can run any RUU - and that would downgrade *everything*..
The RUU is as far as I know a collection of all of the partition images for the phone.
Even with S-off it is not possible to downgrade an HBoot without flashing that HBoot separately. IOW if you are on a 1.54 firmware, in order to flash an RUU containing 1.44 Hboot you have to flash the 1.44 Hboot by itself or else the RUU will fail.
SuperCID (11111111) will pass the CID check
It is my understanding that in the past, S-off meant you could downgrade with just the RUU but that doesn't seem to be the case anymore.
The RUU install checks a few things
MID and CID
HBoot must be the same or greater version number
if these checks fail, the RUU won't flash even with S-off
The beauty of S-off is, we can flash these things manually without the RUU bypassing the checks.
You can simply use the DD command in a root shell and copy the partitions to the phone, but this is dangerous, because if you put a partition in the wrong location, BRICK.
My knowledge here is not as advanced as many here, so someone please correct me if I got any of this wrong.
Uncle Gunny says, "MAKE A NANDROID"
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Nexus 7 2013 it's like buttah™
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