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[Q] How to downgrade firmware

Can someone please tell me how to go back from .13 to .9 so I can root my TF please? So far I haven't found anything telling me how, just telling me it can be done. I got the old OFW from asus's website and moved it to the root of my SD card and tried a reload but still keeps loading .13 after the wipe.
So can someone tell me how or what I am doing wrong?

Just extract the contents of the .9 OFW into the root of your MicroSD, pop it in the Transformer and it should prompt you to update.
Sent from my Transformer TF101

frosty5689 said:
Just extract the contents of the .9 OFW into the root of your MicroSD, pop it in the Transformer and it should prompt you to update.
Sent from my Transformer TF101
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Click to collapse
Ah cool, just open the zip and let me make the asus/update/... folders on the SD card and it will grab that one. Thanks.
Thank you, I felt so stupid and now it worked just fine.

I also want to downgrade from ICS back to Honeycomp.
Can i do that without root ? - just like an update -
And where can I download the de Version- on the asus webside is only theDE 4.0.3 version.
Kind regads
gandalf

1234556789 said:
I also want to downgrade from ICS back to Honeycomp.
Can i do that without root ? - just like an update -
And where can I download the de Version- on the asus webside is only theDE 4.0.3 version.
Kind regads
gandalf
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Click to collapse
I don't think you can go backward on a non root tf

baseballfanz said:
I don't think you can go backward on a non root tf
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Click to collapse
-Ok and with root-? What programs do i need and where do i find the original honeycomprom?
kind regards
gandalf

1234556789 said:
-Ok and with root-? What programs do i need and where do i find the original honeycomprom?
kind regards
gandalf
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Click to collapse
Would you consider giving the revolver ROM a try? I downgraded from 1.3.1 beta(ICS) to 3.11(HC).

I am fairly certain Asus like most device manufacturers try to keep you from being able to downgrade from official OEM versions of software back to older versions- the reason being, of course, that the newer versions sometimes fix software and security vulnerabilities (like 8.6.5.21 losing the ability to use an APK file to root, like razorclaw, and imagine a rogue application exploiting this vulnerability, achieving root, and broadcasting to the developer any information without notifying you about it..). The interesting thing is that the method of denying firmware 'updates' to downgrade seems to be arithmetically calculated from the version numbers, basically if update package version is < current version update will be denied. However, when they decided to engineer the update denial this way, it left it's own vulnerability, in that firmwares for the TF101G, being the later model of the TF101, automatically have a higher firmware version because of the 3rd digit is a 6 instead of a 5, indicating that the version is for TF101G. This left the old honeycomb ROMs with this vulnerability- if you had updated to 8.6.5.21, you were still able to 'update' to an older firmware the device viewed as 'newer' than the current device firmware, i.e. 8.6.5.21 users could update from a stock device to downgrade their firmware using the TF101G firmware 8.6.6.19, which could still be rooted with the APK vulnerability.
Now that we have moved onto ICS and there is not yet a TF101G version of ICS available, we lack this native downgrade option, and we are yet to see if Asus is going to fix this 'vulnerability' by simply amending the TF101G and TF101 version numbers, or by altering the way in which the OEM recovery mode accepts or rejects Asus update packages, I have the feeling that they already have with the 9.2.1.11 update recovery that was included.
All of the precursor information I just listed brings me to the only current method known to rollback your firmware if you are on ICS, either 9.2.1.17 or 9.2.1.11..you must root your device with ViperMOD, install CWM via RecoveryInstaller, and use CWM to manually install the firmware to a previous version. This will perhaps add a few layers of complexity..you may have to toggle signature verification and script asserts enabled (I am making a wild guess on this one, I've not yet tried to downgrade just yet), and you will be persistently bothered by Asus update notifications (there are plenty of threads describing how to rid yourself of these). My guess is that soon Asus will begin pulling the HC ROMs from their official website so you might want to grab that ASAP. And if you want to keep from getting bothered by update notifications yet stay stock 100%, you can (until they release the ICS for it) flash the TF101G version of the firmware, 8.6.6.21.
IN SUMMARY; to downgrade ICS to HC, you will have to root and flash recovery modes. There doesn't seem to be a way around it. And IMO it's probably best to NVFlash back to HC, no telling what kind of data will be left that will conflict with HC from ICS if you do simply flash a HC ROM via CWM. You will probably want to make sure you have the right kernel just in case you have to flash it as well..I can imagine a nightmare scenario if the Asus update didn't include a kernel that it leaves your ICS kernel intact, which will not load HC, and also flashes over your recovery, leaving you pretty much bricked without NVFlash. Fairly sure Asus update contain the full ROM- kernel included, but I always err on the side of caution..I'd flash the HC kernel first personally..just to be safe. If nightmare scenario does occur, you can't flash it after you reboot.

Rani El-Maalouf said:
Would you consider giving the revolver ROM a try? I downgraded from 1.3.1 beta(ICS) to 3.11(HC).
Click to expand...
Click to collapse
I had the revolver rom before- with my last transformer.- But ICS - if working, -is better.- and best seems to me: revolver rom ics based on a (good working !!) stockrom.
Meanwhile i rooted the transformer and install CWM - tried stockrom flashing with CWM- but because of usb is not working+ random reeboots, i changed to revolver ics- Revolver ics had a working usb connection (also random reboots- - and today a freeze while booting) .
I trie to find out the reason for the reboots.
I only go back to HC if there are too much problems with this rom - by i had to trie out first.
To luna_c666
---sorry.... need time + dictonary forall that. - but seems to me a good answer.
kind regards
gandalf

Stuck on Eee Pad screen, used OTA 3.2 on rooted 3.1... Help?

Yeah, I wasn't thinking at all. I ran my update check, got excited and just did it. It wasn't until after the fact that I really realized what I might have done.
Well, here's everything that happened/is happening.
I was trying to root my pad and get cwm. The pad was running stock 3.1 at the time this.
Well, after a bit of reading and looking around, I decided the easiest way would be to use the batch script located here: http://forum.xda-developers.com/showthread.php?t=1185104
After setting everything up, I ran the script. My tablet was rooted, I could gain superuser access, and busybox was installed as well...however, I could not get into recovery. At all.
In the zip for the rootkit there are two versions of recovery.img, one to use if the other doesn't work...
Well they both didn't work.
So I play around on my tablet for a while and read about 3.2, check my updates and see that I can get the 3.2 update. I do it, install it.
Stupid.
Now the pad is stuck on the Eee Pad screen with the Asus and nVidia Tegra logo.
I can get into APX mode as well as make the tablet attempt to boot into recovery (though it just hangs on "Booting recovery kernel image").
Can't even turn it all the way off, it just hangs.
I tried downloading the v5 (now v6) script from the above thread, and used all of the options included within, including the 3.2 root & recovery. To no avail.
Seems pretty grim.
My phone is a Samsung Epic which I've rooted, flashed roms, upgraded/downgraded Android... With the phone there's a program to completely unroot and flash back to stock. Is there something like that with tablets?
I might've dived into rooting my tablet before reading enough, I read a significant amount before I did anything to my phone, but I convinced myself the prior experience would make this easy. Obviously not the case.
So...any help would be hugely appreciated. Even if it's just telling me that there's not really anything I can do, because I'll be able to take it back for another (though that can be complicated and is preferably avoided).

since you can get to apx mode try nvflash with stockrom to 8.4.4.5 by following these instructions.
http://tabletroms.com/forums/showthread.php?1071-Factory-3.1-NVFlash-Recovery-Roms&p=9968
You'll then need to upgrade to 8.4.4.11 then to 8.6.5.6 before attempting to root using the v5 beta batch root script http://forum.xda-developers.com/showthread.php?t=1185104
That should get you out of trouble. good luck.

IMHO the problem is the recovery.
The ota updates rely on the stock recovery image for doing its dirty work; for what you wrote, it seems that you have installed cwm...
In the batch script hit "5" to reinstall stock boot+recovery us images.
If this won't work, try the woonie's hint.
Hope this helps.

woonie said:
since you can get to apx mode try nvflash with stockrom to 8.4.4.5 by following these instructions.
http://tabletroms.com/forums/showthread.php?1071-Factory-3.1-NVFlash-Recovery-Roms&p=9968
You'll then need to upgrade to 8.4.4.11 then to 8.6.5.6 before attempting to root using the v5 beta batch root script http://forum.xda-developers.com/showthread.php?t=1185104
That should get you out of trouble. good luck.
Click to expand...
Click to collapse
Woonie is correct, I did this to myself last week. After using NVFlash to get back to stock 8.4.4.5, do not let the pad restore settings from your gmail account. Wait for that until after you have it upgraded to 8.6.5.6 and rooted it again to sync up to your account.

http://forum.xda-developers.com/showthread.php?t=1192072&page=2
I follow jhanford's post and get this done.

Help with unrooting and making OTA updates work again?

Hello,
Well first off, I have unrooted the tablet already (I think). I followed this guide here:
http://forum.xda-developers.com/showthread.php?t=1154947&highlight=easy+unroot
I would have posted my question there, but apparently this forum wont let me post there since I do not have 10 posts yet.
I currently have version 3.2.1 installed, have the stock recovery installed, and do not have superuser showing in my apps list.
However, I am still not getting ICS OTA update. So I can only assume I've done something wrong.
I realize I can simply download ICS firmware update from asus and update it the same way I did 3.2.1 after unrooting, however that wont work. I'm trying to make sure OTA updates are working because I'm giving this table to my computer illiterate sister and need updates to work OTA for her.
Thank you for any assistance!

Asus pulled the OTA ICS update because of reported widespread problems with it.

Hello Steven6282,
any luck already? was ICS cancelled by asus?
Maybe the solution I mentioned in the post below will help?
http://forum.xda-developers.com/showpost.php?p=19468648&postcount=7
on that forum they have stock 3.2 Build of 8.6.5.13 in nvflash. But his depend if you are able to use nvflash (serial number of your tablet)? I used this method and then ota also works again. this way your tablet is really stock without tweaks.
goodluck.

[Q] How Do I Downgrade from ICS to Honeycomb?

Can anyone tell me how to downgrade back to Honeycomb or point me to the enigmatically-named forum post?
I'm running stock 4.0.3, kernel 2.6.39.4.
Please don't hang me if this is already on here somewhere. I did search, but all I found was version numbers and frankly, a lot of stuff I didn't understand.
From the Moderator: Doing a proper search will yield the right results. To find in a search you need to take your original query and then rearrange the word order sometimes to find. oka1
I recently did the OTA update to ICS. Since then I have had power drain, random reboot, and problems connecting to Wi-Fi.
Any help would be greatly appreciated.

Being you're on stock ROM, the only way is if your tf is nvflash compatible.
Serial # B60 or previous (some B70)

B50
My serial starts with B50, so I guess I'm at least in a good starting place.

Loremonger said:
My serial starts with B50, so I guess I'm at least in a good starting place.
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Click to collapse
Yes the B50 certainly is NVFlash compatible.
Here are a lot of NVFlash ROM, I don't see the latest HC (.21) ROM but try searching here or Google.
http://www.tabletroms.com/forums/tr...stock-3-2-recovery-roms-unbricking-tools.html
or it might update itself in stage up to .21 (not 100% sure on this)

Thank you, baseballfanz, that at least gives me a starting point.
From the Moderator: Doing a proper search will yield the right results. To find in a search you need to take your original query and then rearrange the word order sometimes to find. oka1
Click to expand...
Click to collapse
Well, at least I didn't post in the developer's forum. Anyway, it doesn't matter how much you manipulate the search, it won't yield results that aren't on this forum.

What abt 101G S\N B90 running ICS 9.2.2.3 ? How to downgrade to HC ?
Note: Don't have root and can't root

hearts king101 said:
What abt 101G S\N B90 running ICS 9.2.2.3 ? How to downgrade to HC ?
Note: Don't have root and can't root
Click to expand...
Click to collapse
Sorry, dude. But from what I found out today, it looks like anything above B70 is "in the works." Something should be out soon, but for now, it looks like you're stuck. I would check this post regularly to see if an update is available for later models.

I did that yesterday hoping that with a clean stock installation would fix problems (and it's working great until now, but as all we know problems come in a random way with ics).
So, I found on the net an nvflash 8.6.5.13 ww rom (full with bootloader, kernel and recovery).
Backup all your stuff first.
I booted into cwm, complete wipe, including /data/media.
Put tf in apx mode, nvflash complete rom, boot it.
After then I configured wifi and a notification about updates appeared. I did that and my tf was upgraded to 8.6.5.21 ww.
Then you can use that, flash cwm with nvflash, flash any honeycomb rom.
Instead I upgraded it with stock 9.2.1.17 ww rom (using official upgrade notification), because I want to see if it works correctly for me (100% stock without root, 9.2.1.17 is not rootable without flashing over a modified rom or with ota rootkeeper)..
Only time will tell if problems are gone for me on ics...

Can't Update Firmware

So I've happily been using my TF300 for the past few weeks while on vacation, but now that I'm back I wanted to fix the nagging issues with it, namely that it'd crash every so often, usually while in sleep, and also that I couldn't get the firmware to update.
The only things I had done were to apply the build.prop tweak posted here and root. I decided to go ahead and wipe, so I did a full reset. Tried getting the OTA update, no luck. Tried using OTA RootKeeper to unroot momentarily, no luck. I couldn't get the update showing up. Using the manual update fails with code 12 after only a minute (though the tablet reboots just fine in the main OS).
The only thing left to check was then the build.prop, but (silly me) I can't find my backup. Yay. So I started looking for a stock build.prop, but at this point I'm not even sure which to use. The given build.prop is a US .26 one, but I am certain I was on .17 (couldn't have rooted otherwise), though I don't remember whether it was US or WW. I bought the tablet with NCIX in early May if that helps.
So far I've tried with a stock US .26 and a stock US .17 file (extracted straight from the blob used to downgrade, so I'm pretty sure it's correct), but neither worked. I'm wondering whether I have a WW build, but I can't find a WW .17 blob...
I'm rather confused about all of this, as the tablet seems to be working fine for everything but updating and crashes (which I hoped .26/29 would fix). Can somebody confirm that early Canadian TF300s use(d) the US .17 build? If so, what else could I be doing wrong? The tablet's basically wiped outside of SuperUser and Voodoo OTA.

FriendlyFire said:
The only thing left to check was then the build.prop, but (silly me) I can't find my backup. Yay. So I started looking for a stock build.prop, but at this point I'm not even sure which to use. The given build.prop is a US .26 one, but I am certain I was on .17 (couldn't have rooted otherwise), though I don't remember whether it was US or WW.
Click to expand...
Click to collapse
If you followed the guides you should have it in /system/build.prop.bak or something.
FriendlyFire said:
So far I've tried with a stock US .26 and a stock US .17 file (extracted straight from the blob used to downgrade, so I'm pretty sure it's correct), but neither worked. I'm wondering whether I have a WW build, but I can't find a WW .17 blob...
Click to expand...
Click to collapse
Did you remember to set the /system/build.prop file permissions?
FriendlyFire said:
I'm rather confused about all of this, as the tablet seems to be working fine for everything but updating and crashes (which I hoped .26/29 would fix). Can somebody confirm that early Canadian TF300s use(d) the US .17 build? If so, what else could I be doing wrong? The tablet's basically wiped outside of SuperUser and Voodoo OTA.
Click to expand...
Click to collapse
Canadian TF300s are on WW nowadays.
Check your build.prop again.
Below may make it problematic to return it if it's faulty, but:
Or flash .17 US with wolf's second method (check out the blob thread) and really reset your tab. If you don't get OTA:s - try .17 DE.

Why believe it or not, but I've fixed my issue in the least likely manner. I downloaded the .17 DE blob, extracted the build.prop from it and put it on my tablet. Wouldn't detect any firmware update as being valid.
As a last shot, I went into the firmware update page and lo and behold, it found one and updated! The update went through, I'm on WW .26 and updating to WW .29 as we speak.
Morale of the story: backup your build.prop. Silly me.

You could find all that you want about TF300T here:
[INDEX][14 JUN 12] INDEX of ROMS/RECOVERY/ROOT/GUIDES/HBOOT/RADIOS/TWEAKS etc...
It's not really difficult to found, it's stickied