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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
Click to expand...
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
Click to expand...
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
Click to expand...
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
Click to expand...
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

[Q] ROM flashing? + stock root HELP!!

1I know this has been asked somewhere but what happens when Asus releases minor updates? We have to flash a new rom that will wipe our data??
2Also if I root using the androidroot.mobi procedure, which will give me cwm + Prime (1.4/1.5) can i flash the stock asus rom? will i lose root?
Please help
PS: I am aware of the pure root method but i cant download the file from megaupload. can anyone upload it on dropbox etc.

You have tutorials to just add root for your stock rom, you have cooked rom like Prime or you have stock roms with root.
A cooked Rom like Prime is good because it has minor changes that improves the experience of using your tablet. Everytime ASUS updates (Android 3.2 coming soon) Prime will also update and u dont need to lose your data.
But you can follow the tutorial, downgrade + root + install recovery and leave the tablet as stock rom just having root. So you can use apps that need root.
If you're scared that one day you gonna need to return the tablet for warranty, there is also tutorials to put it back to the start as if it was new.
So i think you should give Prime Rom a try, you will love it.

thanks for the quick reply
So i think you should give Prime Rom a try, you will love it.
Click to expand...
Click to collapse
not so sure about that but ill give it a try
good news is that i wont lose all my data for minor updates in the prime rom(or will i?)
But the q still remains that can i root using that method (get prime) and then install stock rom from asus's website????

nikh.aurora said:
thanks for the quick reply
not so sure about that but ill give it a try
good news is that i wont lose all my data for minor updates in the prime rom(or will i?)
But the q still remains that can i root using that method (get prime) and then install stock rom from asus's website????
Click to expand...
Click to collapse
Just used the megaupload link less than 10 minutes ago and it was working fine.

[Q] Iconia A500 3.2.1 ota downgrade

Hey all have a wifi Iconia A500 stock ota 3.2.1 wondering is it safe to downgrade using method two as posted here http://forum.xda-developers.com/showthread.php?t=1276227

Hi i used first method

hamsterksu said:
Hi i used first method
Click to expand...
Click to collapse
Did you have 3.2.1 installed or 3.2? Mainly was hoping to use method 2 as it seems more noob proof. Tottaly new to android and dont really get the gist of custom firmware yet. I thought with method 2 their would be less chance of something going wrong.

i had 3.2
i used the following soft: EUUs_SBK_Acer_A501_0.017.01_PA_ATT.exe
i just edit config in the remp folder. i changed uid and model from 501 to 500

Today i bit the bullet and tried method 2 all went smooth no issue now running thors rom on rooted iconia edit note I was on default acer australia rom 3.2.1

ok so after playing with custom roms for full day and not finding one I liked more than the stock I decided to return to stock. I got it done from the 3.2 ota rom from the developer section. Just wondering if I have to do anything else to receive ota updates again. I have used the check for update feature but it says I'm up to date when I know there is a 3.2.1 update available as I had it before I installed the custom from. Is it just a matter of waiting for it?

Anyone here or anywhere else on the web been able to get hold of the stock
3.2.1 update to sideload the update?

ok after spending most of the day reading this thread http://forum.xda-developers.com/showthread.php?t=1113878 and trying to digest all the info gee major brain scrammble looks like I will no longer receive ota updates. My bad should have spent more time reading instead of jumping in head first. So now I can either wait for ota updates to be posted here and manually update or go back to custom roms full time. So looks like I will be going with option 2 I found a thread here that ics is in the works so don't feel so bad bout my major stuff up. Out of interest will Acer restore defaults for a price?

Back to stock and getting ota updates see my post on page 25 http://forum.xda-developers.com/showthread.php?t=1155664

Hi bulcmal, you seem to know how to solve my question:
I own a new ICONIA A500 and after a few moment with it I updated to 3.2 without reading about it and knowing that has a lot of bugs. Now I want to go back to OTA 3.1 so my question is next one:
After I use the second method presented here: http://forum.xda-developers.com/show....php?t=1276227
Can I update to 3.1 freely (using the update function on the settings).
Thanks a lot.

Method 2 downgrade and you have the right room for your country I don't see why it wouldn't work. After you downgrade when it reboots you will get lots of force close don't panic its fine, then shutdown tablet complete remove your micro sd card delete the downgrade rom and copy the stock rom to the sd card( I just used a cheap card reader for this) then reboot while holding down volume button on left side and power button keap holding till small white text appears in upper left of tablet screen. On a side note its very important to test unzip both updates (the downgrade rom and the stock rom) to be sure they are not corrupt if the process fails to unzip either update you could brick your tab. Also both roms will be called update. Zip don't unzip files any further than this other than to test that they can be unzipped without issues. I take no responsibility if things go pear shaped just describing what I did.

tebaniconia85 said:
After I use the second method presented here: http://forum.xda-developers.com/show....php?t=1276227
Can I update to 3.1 freely (using the update function on the settings).
Thanks a lot.
Click to expand...
Click to collapse
I wouldn't risk updating from the settings menu the downgrade rom is very unstable and you may get errors see post above cheers.

Hi, I read the post above and have two more questions:
First:
I bought the tablet on Amazon US. How do I know which rom do I need?
And second:
After I flash the stock rom, the OTA updates will be available?
I am new to this flashing thing so bare with me if my questions are a bit stupid.
Thanks a lot.

Do you think this will work with a USB storage?

tebaniconia85 said:
Hi, I read the post above and have two more questions:
First:
I bought the tablet on Amazon US. How do I know which rom do I need?
And second:
After I flash the stock rom, the OTA updates will be available?
I am new to this flashing thing so bare with me if my questions are a bit stupid.
Thanks a lot.
Click to expand...
Click to collapse
I dont know wich stock rom you would need Usally you would search for the rom based on what country you are in. But seeing as you imported it I dont know how it would work. On the other hand if you got ota updates in your country perhaps it is now running your countries firmware. I succesfully got ota updates after doing this.

Alecegonce said:
Do you think this will work with a USB storage?
Click to expand...
Click to collapse
??? Do you mean can you use usb storage to do the downgrade and the installation of the stock rom? If so I think it only works from the micro sd card slot.

Also guys the 3.2.1 update is currently being rolled out if you dont need root you could always wait for that update it may also fix your issues cheers

how long has the 3.2.1 update been rolling out? still stuck on 3.2 here in melbourne. I got the tablet a week ago and it updated only up to 3.2.

I originally got it early-mid november, then acer pulled the update. It was re released about 2 weeks ago. I am still waiting for it to come back to.

ok, thought i was being left behind. guess i have to be patient lol

[Q] ICS questions and OTA update enforcement worries

I own an EEE PAD Transformer TF101 and its got the 8.6.5.21(WW) firmware and I rooted it via Nachoroot and have installed CWM to be able to make full system backups/restores.
Now in the one hand I'm elated a new Android version called ICS is coming soon but have a couple of 'fears' and questions.
-Will the Tegra2 inside the TF101 run ICS just as smooth as Honeycomb ?
-I want to choose the moment ICS gets updated myself and I hate being forced by OTA but am I right that with Nachoroot and CWM installed it won't work anyways so no fears for that ?
-In that case I still keep getting OTA notifications I guess. Is here a tool to switch that off ?
Would it be wise to use OTA Keeper to backup my root or has OTA Keeper got any drawbacks ?
I bet ICS will at first not be rootable anyways right ?

maicod said:
I own an EEE PAD Transformer TF101 and its got the 8.6.5.21(WW) firmware and I rooted it via Nachoroot and have installed CWM to be able to make full system backups/restores.
Now in the one hand I'm elated a new Android version called ICS is coming soon but have a couple of 'fears' and questions.
-Will the Tegra2 inside the TF101 run ICS just as smooth as Honeycomb ?
-I want to choose the moment ICS gets updated myself and I hate being forced by OTA but am I right that with Nachoroot and CWM installed it won't work anyways so no fears for that ?
-In that case I still keep getting OTA notifications I guess. Is here a tool to switch that off ?
Would it be wise to use OTA Keeper to backup my root or has OTA Keeper got any drawbacks ?
I bet ICS will at first not be rootable anyways right ?
Click to expand...
Click to collapse
Correct. A rooted device most likely will have OTA disabled. To confirm, just go into Settings -> About Tablet and if you see a Check for System Update link, then OTA is probably still enabled. You may have to put a rebuilt Rom like Krakd or Prime 2.11 to have OTA disabled.
I think that Root will come fairly quickly for ICS considering the Source has been released for a long while. So the guys who look for those root exploits probably already have a nice stash lined up for when devices receive their updates.
Tegra 2 is plenty powerful enough to run ICS, that combined with the amount of Ram you shouldn't be to worried about that.
If you want...hop over to the Development threads and grab the latest ICS port from Paul Burton. That way you can check it out and see how you feel about ICS. Note: Paul's build are still considered early and some things may not work as you want, but that doesn't mean they won't work at all once Asus pushes out the official build or when Paul finishes up his port.

if you do flash paul's ROM please ask any questions in this thread HERE, and not in the dev thread. Also, be sure to read everything before flashing. It isn't quite complete and you will want to go back to HC after you flash.

gVibeR said:
Correct. A rooted device most likely will have OTA disabled. To confirm, just go into Settings -> About Tablet and if you see a Check for System Update link, then OTA is probably still enabled.
Click to expand...
Click to collapse
I checked and the update link still works and I'm sure I will still get OTA notifications
One good thing is that I noticed that since the RESCUE partition is replaced with CWM that OTA will fail when it reboots into rescue mode to install the update.
I am not keen on installing these ROMS that you mentioned since I don't know what is removed etc. compared to the original roms.
I was thinking this:
since I have root access isn't there a way to remove the OTA update service from starting up by using "terminal emulator" from the Android Market and edit the config file or directory where the OTA update notification service gets started ? Anyone knows if this is possible and how ?
I moved /system/UpdateLauncher.apk and Updatelauncher.odex into another map but that didn't stop the notifications and renaming ota.certs isnt wise since the new firmware update file will keep downloading again and again.
gVibeR said:
I think that Root will come fairly quickly for ICS considering the Source has been released for a long while. So the guys who look for those root exploits probably already have a nice stash lined up for when devices receive their updates.
Tegra 2 is plenty powerful enough to run ICS, that combined with the amount of Ram you shouldn't be to worried about that.
Click to expand...
Click to collapse
okay cool !
Thanks for the Paul Burton tip but I think I just wait until ICS comes available. I bet it won't take long anymore.

maicod said:
I checked and the update link still works and I'm sure I will still get OTA notifications
One good thing is that I noticed that since the RESCUE partition is replaced with CWM that OTA will fail when it reboots into rescue mode to install the update.
I am not keen on installing these ROMS that you mentioned since I don't know what is removed etc. compared to the original roms.
I was thinking this:
since I have root access isn't there a way to remove the OTA update service from starting up by using "terminal emulator" from the Android Market and edit the config file or directory where the OTA update notification service gets started ? Anyone knows if this is possible and how ?
I moved /system/UpdateLauncher.apk and Updatelauncher.odex into another map but that didn't stop the notifications and renaming ota.certs isnt wise since the new firmware update file will keep downloading again and again.
okay cool !
Thanks for the Paul Burton tip but I think I just wait until ICS comes available. I bet it won't take long anymore.
Click to expand...
Click to collapse
Dont screw with the system its just not good news!!!!!!
If you have cwm recovery ota will check and you will know when ics arrives but it wont install because of the custom recovery not because of root as stated above.
Sent from my Transformer TF101 using xda premium

If you don't want to get the update at all, freeze or disable DMClient app.

[Q] JB back to ICS, still possible to use NvFlash?

I recently purchased my TF700- I wasn't aware of the fact that unlocking the boot loader would void your warranty, and that there was a slightly more complicated process for prepping the TF700 for flashing roms and kernels compared to previous android devices. (This is my first tablet, so I don't know if this is normal for tablets though!) Plus the fact that I need to be on ICS to do everything initially.
And just a BTW, this is comparing it to my experiences w/ the G1, Epic 4G, GS2, and the GS3- where I never actually had to deal with unlocking the boot-loader directly/or having the risk of ruining my warranty.
So basically what happened was that I read through the forums and learned that unlocking the bootloader would void your warranty- and being that it is always risky business + the fact this tablet is a lot more expensive than a phone- I decided I wasn't going to be rooting/flashing roms and kernels and etc, on my TF700. I didn't want the risk of bricking something I just paid $600 bucks for. So I took the OTA update to Jellybean.
With further research though, I found out about NvFlash, and then it would make my tablet brickproof. And that immediately sparked my interest! I read though, that it does not work with the .30 firmware though.
This is where I got a bit confused- I know I can downgrade to ICS (the .30 v tho) and then unlock/root/then flash stuff.
BUT, by me taking the OTA update to 4.1.1 JB, did I **** up my ability to use NvFlash? Cause I really want too unlock my phone and flash roms, but I'm just really scared of bricking my device.
If anyone could help with what my plan of action should be, it would be much appreciated, thanks!

Can't be done unfortunately, you need .26 firmware for nvflash. At the moment you're out of luck :/

****! Well just my luck :/.
I was going to send in my TF700 back in anyways for a replacement since the screen was popping out in the corner, so I guess I'll wait till then!
Thanks for the response!

Just out of curiosity, why doesn't downgrading back to an ICS rom do the trick? Is there something that gets left behind by Asus's JB rom that doesn't get downgraded when you go back to Asus's ICS rom?
Sorry to revive an old thread but I couldn't find a pertinent new thread about this.
Thanks!

pgratz said:
Just out of curiosity, why doesn't downgrading back to an ICS rom do the trick?
Click to expand...
Click to collapse
You need a bootloader that does not check signatures to install the hacked bootloader. You cannot downgrade to such a bootloader, because all later ones do check signatures, and the unsigned ones are rejected.

pgratz said:
Just out of curiosity, why doesn't downgrading back to an ICS rom do the trick? Is there something that gets left behind by Asus's JB rom that doesn't get downgraded when you go back to Asus's ICS rom?
Sorry to revive an old thread but I couldn't find a pertinent new thread about this.
Thanks!
Click to expand...
Click to collapse
Well, Asus had patched the security hole with .26 ICS firmware. They updated the next version of ICS which is .30 and this blocked the exploide. The signature (key) from the ICS .30 is no longer the same as ICS .26. So if you tried to downgrade to .26, you're going to see signature mismatch and it will failed. The signature on ICS .30 and all of the JB are the same, so you can upgrade or downgrade from 30 and up....Here is where the story ended!!

Ah, OK that makes sense. Thanks for the explanation!
Paul

Downgrade from JellyBean to ICS
Hi,
I am very new hear and not sure how to start a new thread. I just purchased the Asus TF700t because it was supposed to have ICS, but I found it has JellyBean. Is there a way to downgrade it to ICS?
Thank you.

etoliway said:
Hi,
I am very new hear and not sure how to start a new thread. I just purchased the Asus TF700t because it was supposed to have ICS, but I found it has JellyBean. Is there a way to downgrade it to ICS?
Thank you.
Click to expand...
Click to collapse
You need to look around a bit.
I attempted an answer for you in another thread that you had replied in.
Please look here >>>> http://forum.xda-developers.com/showpost.php?p=38530719&postcount=5