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Get Downgrade for HTC Desire Z

12 posts
Thanks Meter: 1
By Forgath, Junior Member on 4th June 2014, 06:48 PM
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I know there are many related Threads, but I didn't found the right solution, so I try it with a new thread.. (Didn't seemed for me to be right in "Development Q&A - Ask Development Questions Here!")

So, I bought a used HTC Desire Z. I had it once and it is a really nice Phone. But Time passes by so I wanted to install the Cyanogenmod. I already did this once with a Samsung Galaxy S I. But here I get Problems from the beginning.

So I am pretty sure it is a European (German) model. So I first tried out:

But it stopped there:
/data/local/tmp/fre3vo -debug -start FAA90000 -end FFFFFFFF
"this device either does not support the fre3vo exploit" desire z
The Android Version Says it is 2.3.3. So I think it should be the right howto.
But anyway... I tried out the Froyo Howto also:

It endet with a:
/data/local/tmp/fre3vo -debug -start FAA90000 -end FFFFFFFF
"Failed to set prot mask"
After some searching i found that:

But this already stops at that part:
adb shell cat /dev/msm_rotator
/system/bin/sh: cat: /dev/msm_rotator: No such file or directory
So... also after I had searched further... I found the solution could be to install HTC drivers:

But that also didn't worked. With the HTC Drivers installed, I am not even able to start adb anymore.
error: more than one device and emulator
I am trying this on windows... but could make it also with linux if this would help.

So.... does anyone have an idea?

Thanks and Greets
4th June 2014, 09:18 PM |#2  
Hey, this can be done on either Linux or win 7 and older (8 and 8.1 often have driver issues) once you get adb and fastboot up and running on any of the system (test by typing adb devices or fastboot devices and look for your serial #) I'll be able to help you further
Also please boot to bootloader and write down everything you see here

Sent from my Nexus 4 using XDA Premium 4 mobile app
4th June 2014, 10:58 PM |#3  
OP Junior Member
Thanks Meter: 1
So, till now I use Win7 (Couse adb didn't create a platform-tools or Android folder. But if it doesnt matter, I'll use Win7)

adb devices says:
List of devices attached
emulator-5554   device
So, nothing with an #

But at Phone-Identity I found that:
(Not the IMEI)

The Bootloader says that:
Apr 11 2011,23:36:27


<VOL UP> to previous item
<VOL DOWN> to next item
<POWER> to select item

4th June 2014, 11:53 PM |#4  
You have eclipse or some emulator running that needs to be closed, a reboot should do but if needed remove it all together (when you had the multiple devices error that was from seeing your phone and emulator at same time)

OK so the second post on this thread
Will have a link for adb and fastboot, see the first link there (how to why to)
You will get the proper drivers and instruction on how to set them up
Once working we can go from there

Sent from my Nexus 4 using XDA Premium 4 mobile app
5th June 2014, 12:37 AM |#5  
OP Junior Member
Thanks Meter: 1
Ok, I took the shortcut and switched to my Linux Notebook...
There I get this:
root@KubuntuTablet:~# adb devices
List of devices attached 
SH0BPRT06334    device
5th June 2014, 12:57 AM |#6  
Now from that same link I sent you, in the beginning of second post there is a link to the HTC vision xda wiki
Here is all your root info, including the link for downgrading. Use either this guide or the PDF that strawmetal made.
Start from the beginning, don't skip anything, download all needed, unzip what is needed.
If you get stuck copy and paste all input/output from terminal here

Sent from my Nexus 4 using XDA Premium 4 mobile app
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5th June 2014, 01:55 AM |#7  
OP Junior Member
Thanks Meter: 1
it was ecplipse on Win7. So now everything went smooth. Thank you!
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