[HOW-TO] Downgrade from JB to ICS with locked bootloader

cedesmith · Oct 7, 2012

Hi.
I upgraded to JB without being rooted, now want root but i'm not ready to unlock bootloader yet. After reading the guide here and seen it requires unlocked bootloader i tried another approach.

WARNING: As always there is a chance something may go wrong... If you do it i'm not responsible for bricks, do it on your own risk.
WARNING: This will wipe your data
WARNING: As with all updated make sure your battery is charged

This is what i did:
1. download .30 firmware from asus site that matches your SKU
2. extract the zip file to the root of your microSD card
3. rename extracted file (ex: US_epad-user-9.4.5.30.zip as mine is US SKU) to EP201_768_SDUPDATE.zip
4. insert sdcard and power off tablet
5. press power+voldown, release them after it starts and press volup within 5 seconds to enter stock recovery
6. working android displayed .................. wait patiently to finish update...........

I think this method is peaty safe as is a normal update, no fastboot, root or unlocked bootloader.
I sincerely thought asus recovery will skip the update because is a lower version then the one installed but it did not.

bckldwn · Oct 7, 2012

cedesmith said:
Hi.
I upgraded to JB without being rooted, now want root but i'm not ready to unlock bootloader yet. After reading the guide here and seen it requires unlocked bootloader i tried another approach.

WARNING: As always there is a chance something may go wrong... If you do it i'm not responsible for bricks, do it on your own risk.
WARNING: This will wipe your data
WARNING: As with all updated make sure your battery is charged

This is what i did:
1. download .30 firmware from asus site that matches your SKU
2. extract the zip file to the root of your microSD card
3. rename extracted file (ex: US_epad-user-9.4.5.30.zip as mine is US SKU) to EP201_768_SDUPDATE.zip
4. insert sdcard and power off tablet
5. press power+voldown, release them after it starts and press volup within 5 seconds to enter stock recovery
6. working android displayed .................. wait patiently to finish update...........

I think this method is peaty safe as is a normal update, no fastboot, root or unlocked bootloader.
I sincerely thought asus recovery will skip the update because is a lower version then the one installed but it did not.

Thanks, I might just try this.. the DPI really bugs me on JB!

-lukin- · Oct 8, 2012

cedesmith said:
Hi.
I upgraded to JB without being rooted, now want root but i'm not ready to unlock bootloader yet. After reading the guide here and seen it requires unlocked bootloader i tried another approach.

WARNING: As always there is a chance something may go wrong... If you do it i'm not responsible for bricks, do it on your own risk.
WARNING: This will wipe your data
WARNING: As with all updated make sure your battery is charged

This is what i did:
1. download .30 firmware from asus site that matches your SKU
2. extract the zip file to the root of your microSD card
3. rename extracted file (ex: US_epad-user-9.4.5.30.zip as mine is US SKU) to EP201_768_SDUPDATE.zip
4. insert sdcard and power off tablet
5. press power+voldown, release them after it starts and press volup within 5 seconds to enter stock recovery
6. working android displayed .................. wait patiently to finish update...........

I think this method is peaty safe as is a normal update, no fastboot, root or unlocked bootloader.
I sincerely thought asus recovery will skip the update because is a lower version then the one installed but it did not.

Thanks bro - that worked perfect.

johnlgalt · Oct 8, 2012

This was already posted elsewhere b/c it is how I rooted my JB 4 days ago. I think it was Praetorian or jrotsky who posted it.

I tried the same method with trying to revert 9.4.5.30 to 9.4.5.26 but that is a no go - only 10.4.4.16 will revert to 9.4.5.30

Pretoriano80 · Oct 8, 2012

johnlgalt said:
This was already posted elsewhere b/c it is how I rooted my JB 4 days ago. I think it was Praetorian or jrotsky who posted it.

I tried the same method with trying to revert 9.4.5.30 to 9.4.5.26 but that is a no go - only 10.4.4.16 will revert to 9.4.5.30

Yeah,OP did a nice found..hehehe --> http://xdaforums.com/showthread.php?t=1833212

doncieslacco · Oct 8, 2012

cedesmith said:
Hi.
I upgraded to JB without being rooted, now want root but i'm not ready to unlock bootloader yet. After reading the guide here and seen it requires unlocked bootloader i tried another approach.

WARNING: As always there is a chance something may go wrong... If you do it i'm not responsible for bricks, do it on your own risk.
WARNING: This will wipe your data
WARNING: As with all updated make sure your battery is charged

This is what i did:
1. download .30 firmware from asus site that matches your SKU
2. extract the zip file to the root of your microSD card
3. rename extracted file (ex: US_epad-user-9.4.5.30.zip as mine is US SKU) to EP201_768_SDUPDATE.zip
4. insert sdcard and power off tablet
5. press power+voldown, release them after it starts and press volup within 5 seconds to enter stock recovery
6. working android displayed .................. wait patiently to finish update...........

I think this method is peaty safe as is a normal update, no fastboot, root or unlocked bootloader.
I sincerely thought asus recovery will skip the update because is a lower version then the one installed but it did not.

Thanks for you guide, I am waiting for my TF700T, but read a lot about rooting process without unlocking bootloader, so please tell me:
What about root after your guide ?? Just use rooting instruction from here and use OTA rootKeeper and should work ??

Regards
Doncieslacco

johnlgalt · Oct 8, 2012

doncieslacco said:
Thanks for you guide, I am waiting for my TF700T, but read a lot about rooting process without unlocking bootloader, so please tell me:
What about root after your guide ?? Just use rooting instruction from here and use OTA rootKeeper and should work ??

Regards
Doncieslacco

JB cannot currently be rooted, so you'll need to root 9.4.5.30 first, then use OTA rootkeeper to make a backup of root and enable OTA survival (I also enabled OTA survival in superuser), then apply the JB update, and finally use OTA rootkeeper to restore root.

Also, I would highly advise not installing any apps on it in ICS, b/c a lot of people are experiencing idiosyncrasies in JB that are fixed if you perform a factory reset - since your tablet will be brand new, a factory reset will be a lot less painful with no apps installed.

If you are about to receive your tablet, and it is on 9.4.5.26 or lower, I'd seriously consider first using nvFlash to make a pure backup of the entire before updating to 9.4.5.30, b/c nvFlash does not work on 9.4.5.30 nor 10.4.4.16.

Sent from my ASUS Transformer Infinity TF700 running Android JB (rooted) via Tapatalk

bckldwn · Oct 8, 2012

Thank you OP, this worked great; back to 160 DPI! :victory:

_that · Oct 8, 2012

johnlgalt said:
If you are about to receive your tablet, and it is on 9.4.5.26 or lower, I'd seriously consider first using nvFlash to make a pure backup of the entire before updating to 9.4.5.30, b/c nvFlash does not work on 9.4.5.30 nor 10.4.4.16.

However that requires unlocking first,voiding your warranty.

cferd · Oct 16, 2012

Thanks OP, this worked. At first I lost the long-press function, where for example an app on the home screen is long-pressed then moved to the top to remove. The apps would always open, regardless of whether I just touched them or long-pressed them. A factory reset in recovery fixed it, in case anyone else experiences this.

hit173 · Oct 16, 2012

I keep getting the android with red exclamation mark. I did everything posted here but I did it through my tablet. I named the file like it says here and put it on the root of my SD. I extracted the file. Do I need to extract or no?

Sent from my ASUS Transformer Pad TF700T using XDA Premium HD app

flhthemi · Oct 17, 2012

The file you get from Asus is a .zip file. Inside it is another .zip file. Unzip ONE TIME and rename the .zip file while it is on your PC. Then copy it to the sdcard. I used a sdcard reader connected to my PC to copy the file then popped it in the tablet.

when I tried to do it all on the tablet I got the same results. (it no workie)

Shohou · Oct 17, 2012

Can new JB 10.4.4.18 be downgraded to ics too?

hit173 · Oct 18, 2012

Shohou said:
Can new JB 10.4.4.18 be downgraded to ics too?

This?

Sent from my ASUS Transformer Pad TF700T using XDA Premium HD app

KoRoZIV · Oct 18, 2012

I don't see why not, it's only a minor update

Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

hit173 · Oct 18, 2012

Wtf I keep getting the Android with red exclamation...... I am locked with no root still on .16 I wiped everything and I'm still getting the freaking same ****.. Is pissing me off cuz IM really trying to go back down to ics. I need help. I did everything posted here. I even did through the computer now and still nothing.. I swear I am about to shove it out a window

Sent from my SPH-D710 using xda app-developers app

buhohitr · Oct 18, 2012

hit173 said:
Wtf I keep getting the Android with red exclamation...... I am locked with no root still on .16 I wiped everything and I'm still getting the freaking same ****.. Is pissing me off cuz IM really trying to go back down to ics. I need help. I did everything posted here. I even did through the computer now and still nothing.. I swear I am about to shove it out a window

Sent from my SPH-D710 using xda app-developers app

Can you describe exactly what steps you did in your own words here so I can help?

pr4wn3r · Oct 18, 2012

do i have to copy that to an SD card, or would it be enough to copy it on the tablet? dont have an SD card yet^^

buhohitr · Oct 18, 2012

pr4wn3r said:
do i have to copy that to an SD card, or would it be enough to copy it on the tablet? dont have an SD card yet^^

yes, you can copy it to the root of your internal sdcard.

pr4wn3r · Oct 18, 2012

hit173 said:
Wtf I keep getting the Android with red exclamation...... I am locked with no root still on .16 I wiped everything and I'm still getting the freaking same ****.. Is pissing me off cuz IM really trying to go back down to ics. I need help. I did everything posted here. I even did through the computer now and still nothing.. I swear I am about to shove it out a window

Sent from my SPH-D710 using xda app-developers app

having the same problem.
when trying to get into recovery mode (power + vol down, then select the recovery mode) i dont get into recovery mode, but i get a dead android with an exclamation mark..

[HOW-TO] Downgrade from JB to ICS with locked bootloader

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