Root Who Makes RUUs?

[remanifest]

Are the RUUs only made by HTC? From what I understand, the issue is assigning a valid HTC signature to the firmware so that the phone will take it without question. Is this correct?

My hacking wheels are turning.

 

[ramjet73]

Are the RUUs only made by HTC? From what I understand, the issue is assigning a valid HTC signature to the firmware so that the phone will take it without question. Is this correct?

Yes, HTC makes the RUU's and has to digitally sign them for S-ON users to flash them.

ramjet73

 

[Snake X]

iirc on one of football's xda posts/threads (not sure if it still exists) i thought i saw 2 different RUU's for the evo v 4g. I only have one of them though currently.

Oh, and it's not possible to modify a RUU and still have it run by the way. Not as far as I know anyways.

 

[ron scubadiver]

The next question is will we see an RUU that restores to the latest OTA? Yes, I know the answer to this is unknown. Is such an item required to build custom ROMs that are fully compliant with the latest OTA?

 

[Mobstergunz]

Maybe if someones really good at making or modifying EXE files and is the phone S-OFF it might work......

 

[ramjet73]

Maybe if someones really good at making or modifying EXE files and is the phone S-OFF it might work......

Or just create an updated zip file from the one in the current RUU that includes all the updated firmware and ROM files after both OTA's are applied.

That's definitely possible but it wouldn't help S-ON users that are already on the 2.95 build with hboot 1.58.

ramjet73

 

[Mobstergunz]

Or just create an updated zip file from the one in the current RUU that includes all the updated firmware and ROM files after both OTA's are applied.

That's definitely possible but it wouldn't help S-ON users that are already on the 2.95 build with hboot 1.58.

ramjet73

Yup or maybe modifying the build description in the build prop to a lower version like 1.13 so that it'll take the RUU

 

[Rxpert83]

Yup or maybe modifying the build description in the build prop to a lower version like 1.13 so that it'll take the RUU

Ruus go by your radio information for updating. Modifying a build prop won't help

 

[Mobstergunz]

Ruus go by your radio information for updating. Modifying a build prop won't help

........... :hmmmm2: that sucks

 

[Rxpert83]

You can pull the ROM out of an RUU, as well as pull the patches out of the ota update and make a functional updated ROM.

You have to downgrade your radio to be able to use an ruu to downgrade your hboot. Going down that road is brick city.

You can also try being polite to HTC and requesting the ruu via email. I've seen it work before.

I've had lots of time with HTC devices.

 

[ramjet73]

You have to downgrade your radio to be able to use an ruu to downgrade your hboot. Going down that road is brick city.

Not if you are S-OFF. And S-ON users can't modify firmware without flashing an RUU or OTA.

You can also try being polite to HTC and requesting the ruu via email. I've seen it work before.

I tried that a while back for my Evo 3D (at your suggestion) and got a negative response from HTC. Here's the post that includes their answer.

ramjet73

 

[HaTrEd360]

We need to just find a way to downgrade hboot without the need of S-Off.

 

[Palmetto Fellow]

When I am reducing the chicken broth for a sauce I am making, I usually make the ruu towards the end to thicken things up a bit

 

[nsciucco]

Lol

 

[OverByter]

We need to just find a way to downgrade hboot without the need of S-Off.

It's an impossibility the whole concept of having the security flag set to on is to protect the device from modified files Any updated RUU that HTC would release will most likely have the new hboot, and that's if they even get around to it.
OB

 

[Rxpert83]

Not if you are S-OFF. And S-ON users can't modify firmware without flashing an RUU or OTA.

ramjet73

Yes, s-off users can do as they please...

My response was geared toward s-on, as they're the ones who have issues. Devs for other htc phones have methods of downgrading radios in order to take an older ruu and use a patched s-off method.

I'm not making stuff up here, just telling you what other htc phone devs have done.

You guys are at a disadvantage because HTC has already caught many of the exploits with the 3D before they rebranded it.

 

[Snake X]

I tried that a while back for my Evo 3D (at your suggestion) and got a negative response from HTC. Here's the post that includes their answer.

ramjet73

Since that email was back in January, I shot them another email to see if I wouldn't be able to get better luck with another person that handles the software. I made sure to include politeness with it haha. Let's see what they say...

Oh, one other thing. To any of you who are not at Hboot 1.58 and ran the RUU successfully, the RUU will output a log of everything it does with ADB to a text file in "C:/ruu_log" so something in there may hold the key to getting more advancement in our struggle if we are able to manually do the commands ourselves.. though, it really depends more on the zip file thats being flashed than the executable itself. So, that won't get us anywhwere...