Database Users

[Q] Downgrade from 4.2 to 4.1.2

Some apps not working after updated to 4.2, so I'm considering back to 4.1.2.
Though I never done this before since the day I get Nexus 7,
I think use Wug's Nexus Root Toolkit should get it done.
But just for sure:
1. Do I need to unlock/root to flash factory 4.1.2 image? (I think it is not but not so sure)
2. Directory structure seems different from 4.1.2, is it OK just using Toolkit to backup/restore settings?
(Sorry for my English if anything looks impolite)

1) unlock bootloader yes; root no, as you're going to overwrite the system anyways.
Also I'd suggest not using a toolkit, just download the factory image off google's page and run the "flash-all.bat"
2) Use Titanium Backup to backup all app data, wipe after flashing 4.1.2 and then restore apps + data with Titanium again

I just downgraded this morning. All your data will be wiped .. ALL YOUR DATA ... meaning, after I got back to 4.1.2 I was having 13GB of free space on the tablet (out of 13 possible) .
So, if you HAVE a nandroid from the 4.1.2 days, save it to your computer (along with all your files).
If you don't have a 4.1.2 nandroid, at least create now a backup repository with whatever tool you prefer and then save the respective files to PC.
Then, flash the factory image for 4.1.2.
Then copy all your files back to the internal memory, install the backup tool and restore your apps.
The reason behind this is that the update from 4.1.2 to 4.2 has some scripts that are porting the original /data and /sdcard mounts to the new structure used in 4.2
When downgrading, you no longer have scripts to do that for you so the newly installed 4.1.2 will not recognize anything so it will bootloop like crazy (I tried first to restore just the /system ... but all the other data was already affected by the update so was no longer usable).

My thoughts:
If you got the ota, and things messed up, try flashing the 4.2 factory image. That seemed to help me. If you're not rooted already, I would recommend becoming familiar with the adb backup command to backup apps before doing anything else. You have to unlock the boot loader to downgrade or flash the factory 4.2 image, and this will wipe the device.
Once you update either way, definitely take the time to root. You can then use adb restore or titanium backup to restore from the adb backup you made before unlocking.
Just be aware that adb backup doesn't seem to backup all apps, and that titanium backup isn't exactly fast parsing through a big adb backup file.
Sent from my SAMSUNG-SGH-T989 using Tapatalk 2

step by step?
srry, very nooby questions:
how do i flash my nexus?
where do i find the factory image?
what is the backup tool?
ro_explorer said:
I just downgraded this morning. All your data will be wiped .. ALL YOUR DATA ... meaning, after I got back to 4.1.2 I was having 13GB of free space on the tablet (out of 13 possible) .
So, if you HAVE a nandroid from the 4.1.2 days, save it to your computer (along with all your files).
If you don't have a 4.1.2 nandroid, at least create now a backup repository with whatever tool you prefer and then save the respective files to PC.
Then, flash the factory image for 4.1.2.
Then copy all your files back to the internal memory, install the backup tool and restore your apps.
The reason behind this is that the update from 4.1.2 to 4.2 has some scripts that are porting the original /data and /sdcard mounts to the new structure used in 4.2
When downgrading, you no longer have scripts to do that for you so the newly installed 4.1.2 will not recognize anything so it will bootloop like crazy (I tried first to restore just the /system ... but all the other data was already affected by the update so was no longer usable).
Click to expand...
Click to collapse

HellcatDroid said:
1) unlock bootloader yes; root no, as you're going to overwrite the system anyways.
Also I'd suggest not using a toolkit, just download the factory image off google's page and run the "flash-all.bat"
2) Use Titanium Backup to backup all app data, wipe after flashing 4.1.2 and then restore apps + data with Titanium again
Click to expand...
Click to collapse
restoring my apps with Titanium Backup is unsuccessful , when i first tried a full app+data restore it freezes at 0 percent
and when i tried backuping app the missing apps , it worked but after i rebooted it . It went into a bootloop

Youssef Hossam said:
restoring my apps with Titanium Backup is unsuccessful , when i first tried a full app+data restore it freezes at 0 percent and when i tried backuping app the missing apps , it worked but after i rebooted it . It went into a bootloop
Click to expand...
Click to collapse
Assumed you are referring to downgrade from 4.2.1 to 4.1.2 and rooted to run TB, so the basic stock rom is up & running otherwise, correct?
Let's try Plan B instead - go into (Custom) Recovery and wipe dalvik cache first, then reboot. Give it a few minutes to settle and try to do your TB restore WITHOUT data, and see if it works. The /SD and/or /SD/0 directory structures are setup differently on the N7 and trying to retore with your custom settings will just make it more difficult & complicated. If this works, you can then try to selectively restore one or more with data and hopefully without going into endless bootloop again.
Plan C - go to Play Store, then Settings and "All" - you should see all of your Apps and what's installed, etc. - and install from there, it's semi-manual but it works for me 99.8% of the time when it would otherwise freeze within TB, especially true when switching custom Rom & kernels.
I usually manually copy & move back items such as documents, pictures & mp3's, etc. from standalone/usb backup drives or cloud storage back into the device once everything else are up & running properly.
Let us know if this helps & working for you or not.

Thankss !
Letitride said:
Assumed you are referring to downgrade from 4.2.1 to 4.1.2 and rooted to run TB, so the basic stock rom is up & running otherwise, correct?
Let's try Plan B instead - go into (Custom) Recovery and wipe dalvik cache first, then reboot. Give it a few minutes to settle and try to do your TB restore WITHOUT data, and see if it works. The /SD and/or /SD/0 directory structures are setup differently on the N7 and trying to retore with your custom settings will just make it more difficult & complicated. If this works, you can then try to selectively restore one or more with data and hopefully without going into endless bootloop again.
Plan C - go to Play Store, then Settings and "All" - you should see all of your Apps and what's installed, etc. - and install from there, it's semi-manual but it works for me 99.8% of the time when it would otherwise freeze within TB, especially true when switching custom Rom & kernels.
I usually manually copy & move back items such as documents, pictures & mp3's, etc. from standalone/usb backup drives or cloud storage back into the device once everything else are up & running properly.
Let us know if this helps & working for you or not.
Click to expand...
Click to collapse
Thanks for your help , but I think the problem was that there were apps in the backup only compatible with the custom ROM I had and android 4.2.1 xD
I restored the apps one by one , but I think if I deleted the extra custom rom apps , the process would have finished without any problems

Hi fellow people,
i'm a noob just made my xda account like 5 mins ago. I've been trying to search for my problem but I haven't really a found a direct answer. So yesterday I just got my Samsung Galaxy nexus update to 4.2.1. I was really excited until I started having the battery issues, screen lock issues, and overheating problem. I really don't like 4.2.1 and want to downgrade my version back 4.1.2. My carrier is the Mobicility (Canadian). I did not do anything previously with this phone such as rooting it, doing all the funky stuff that will void my warranty. I heard about flashing some google images to get back 4.1.2 but I'm not sure if I need to root or how to like do it through the gnex toolkit that mskip made. As well what if the difference between yakju and maguro? I heard if you flash the wrong image it will brick your phone or something like that. If there is a method without having to root it and lose all my contacts, then I would prefer that a lot.
Thanks,
mleung754

mleung754 said:
Hi fellow people,
i'm a noob just made my xda account like 5 mins ago. I've been trying to search for my problem but I haven't really a found a direct answer. So yesterday I just got my Samsung Galaxy nexus update to 4.2.1. I was really excited until I started having the battery issues, screen lock issues, and overheating problem. I really don't like 4.2.1 and want to downgrade my version back 4.1.2. My carrier is the Mobicility (Canadian). I did not do anything previously with this phone such as rooting it, doing all the funky stuff that will void my warranty. I heard about flashing some google images to get back 4.1.2 but I'm not sure if I need to root or how to like do it through the gnex toolkit that mskip made. As well what if the difference between yakju and maguro? I heard if you flash the wrong image it will brick your phone or something like that. If there is a method without having to root it and lose all my contacts, then I would prefer that a lot.
Thanks,
mleung754
Click to expand...
Click to collapse
You dont have to root but you need to UNLOCK the bootloader which will obviously erase all your data(and VOID your warranty). you can find the factory image here https://developers.google.com/android/nexus/images . just flash the appropriate image and you should be as good to go.

mleung754 said:
Hi fellow people,
i'm a noob just made my xda account like 5 mins ago. I've been trying to search for my problem but I haven't really a found a direct answer. So yesterday I just got my Samsung Galaxy nexus update to 4.2.1. I was really excited until I started having the battery issues, screen lock issues, and overheating problem. I really don't like 4.2.1 and want to downgrade my version back 4.1.2. My carrier is the Mobicility (Canadian). I did not do anything previously with this phone such as rooting it, doing all the funky stuff that will void my warranty. I heard about flashing some google images to get back 4.1.2 but I'm not sure if I need to root or how to like do it through the gnex toolkit that mskip made. As well what if the difference between yakju and maguro? I heard if you flash the wrong image it will brick your phone or something like that. If there is a method without having to root it and lose all my contacts, then I would prefer that a lot.
Thanks,
mleung754
Click to expand...
Click to collapse
mleung754,
You are posting in the wrong forum.
Asus Nexus 7 is not the same thing as a Samsung Galaxy Nexus.
Ignore mmystere68's remarks.

Nandroid Downgrade from 4.2 to 4.1.2

I made a full Nandroid through TWRP and a full App/data backup via ROM Toolbox before flashing the OTA zip. I just found the deal breaker for me with 4.2. LogMeIn does not display the remote desktop properly which is essential for me as I use it daily for work. My only concern with running the Nandroid restore is how many scripts and file structure changes were done in 4.2.
Has anyone done this without flashing a fresh 4.1.2 ROM?

i'm trying to restore a nandroid backup of 4.1.2 with TWRP but i dont think it's showing up..only the nandroid i just did..wtf

That's because 4.2 changes the SD card folder structure. You'll have to manually move the backup folder back to its right path.
Nandroids replace everything, so you should be ok going back.
What's wrong with logmein ? My remote desktop app requires that I change the resolution for it to work. I would also screw with the dev options.
Sent from my Nexus 7 using XDA Premium HD app

Well I'm back and running 4.1.2, I do think it is much smoother. I flashed a rooted stock rom then did a factory reset. The problem with using just the nandroid was the symlinks created by 4.2. The stock rom reset those, the nandroid may of but I still had to move around some directories and fix the 'sdcard' since the revert left all of my data in the 0 folder and I had to manually move it back to the root of data/media/ as well as consolidate the obb an twrp folders which I did from twrp. Once I was back on a confirmed functioning 4.1.2 base I did a nandroid restore and wiped cache and davlik. All seems to be perfect. I kept root and all.
Logmein was a widespread issue and although it's a $30 app they are slow to support and update it and it is the one app I must have working. There were a few other daily apps that were having issues also, some were updated by the time I reverted though haha. Overall Thought 4.2 was not as quick and was buggy for me. I loved they fixed the volume and the keyboard was great but this is a work device first so ill let xda and the devs iron out the kinks before jumping back up. Volume+ and SwiftKey will hold me over for now
Sent from my Nexus 7 using Tapatalk 2

kangy, i did the same. i figured out that stupid file structure (why is it under /sdcard/0 now?) and i copied the nandroid..took about 1 hour to get everything done how i wanted it.
then i did the stupid thing of flashing the gapps package for 4.2 because i wanted the new apps...without realizing its only for deodex roms, and stock 4.1 is odex lol whoops. had to nandroid like 2 times lol

They did it like that for the multi users to each have their own SD card directory.
Sent from my HTC Evo 3D using Tapatalk 2

I keep getting the prompt to install the ota update, anyone know how to clear that out and then block it. I have to ride out 4.1.2 until Logmein is fixed sometime in the next decade
Sent from my Nexus 7 using Tapatalk 2

kangy said:
I keep getting the prompt to install the ota update, anyone know how to clear that out and then block it. I have to ride out 4.1.2 until Logmein is fixed sometime in the next decade
Sent from my Nexus 7 using Tapatalk 2[/QUOT
know what i did? installed that FOTA.apk ota killer.....it came up like twice after, and hten never has again....awesome!
Click to expand...
Click to collapse

Do you have a link to that apk?

[Q] Clean out Nexus 7

Here is my situation. I acidentally installed a custom rom over my stock JB 4.2.1 installation and I want to know if there is a way to restore my original JB rom without loosing my root and recovery. My current plan is to use TWRP recovery to wipe all caches and internal memory. I have a stock JB rom and after clearing everything I will reflash the stock rom.
I know I should have made proper backups, but I guess this is how I will learn. My goal is to make my nexus 7 the same as when I bought it, but I want it to still be rooted. Will my plan work?
Thanks in advance for any replies.

I'd say use mskip's Google Nexus 7 Toolkit (found here) or Wug's Nexus Root Toolkit (found here) and be done with it. I use mskip's toolkit (personally) and have no issues with it. Use it to restore the N7 to factory shape (4.2.1 is the JOP40D build, the latest, if that's your intention), then boot it up, enable the USB debugging, get back into fastboot mode then use the toolkit to root it, you're done.
If it takes more than a few minutes to do this (which I've done several times in the past week) then you're doing it wrong.
A clean wipe is going to kill the root which must be redone and only takes about a minute itself.

OR, another alternative:
1) Flash full factory ROM
2) Unlock bootloader if not already in that state
3) soft-boot any custom recovery you want to use with fastboot:
fastboot boot recovery-image-file.img
4) Overflash a minimal root package (Superuser.apk + su OR SupserSU + su)
Moral of the story is that even if you flash a completely stock ROM with no root, because you have an unlocked bootloader you can install whatever you want right over the top of it without ever having booted it once.
I suppose that a toolkit might also be able to assist you with such things, but doing things from the command line tends to be better for learning how things work under the hood.

Wug's toolkit will help you do just that. You can even put back a stock rom and root it again

Thank you. It worked perfectly and now I have a brand new clean installation.
I have one last question though. After I logged in with my g-mail, my device started to download all my applications automatically. I had a titanium backup that contained about 70% of my apps and so cancelled the downloads so that I could restore the backup. (I have capped internet so downloading apps that I had backed up seemed like a waste). So now I want to know if it is possibile to download the other 30% of my apps from the store automatically because would prefer to avoid pressing the install button multiple times. I've been looking for some kind of option but I was unable to find it.
Thank you for replying so quickly, it is great to have an operating nexus 7 again.

Fallen9900 said:
Thank you. It worked perfectly and now I have a brand new clean installation.
I have one last question though. After I logged in with my g-mail, my device started to download all my applications automatically. I had a titanium backup that contained about 70% of my apps and so cancelled the downloads so that I could restore the backup. (I have capped internet so downloading apps that I had backed up seemed like a waste). So now I want to know if it is possibile to download the other 30% of my apps from the store automatically because would prefer to avoid pressing the install button multiple times. I've been looking for some kind of option but I was unable to find it.
Thank you for replying so quickly, it is great to have an operating nexus 7 again.
Click to expand...
Click to collapse
I've had mixed results with the auto restore. Sometimes it works, sometimes not so much. Can't say that I blame it though, what with flashing different ROMs, restoring old backups of different ROMs, having the backup feature turned on sometimes & sometimes not...
At this point, the Play Store app on the N7 seems to show me (in the My Apps section, "ALL" listing) every app I have ever installed on any of my devices linked to the same account (including a Google TV device). Not quite what you are asking, but it's certainly better than a few generations ago where - if the auto-reinstall failed - you would have to try to do the same task from nothing but your memory. (Or restore an old backup and have a look-see what was in there)
good luck and enjoy your tab

Updating android 4.3 via ota Status 7 Error

Well i have rooted nexus 7 wifi with cwm installed
I wanna update my tablet to android 4.3 and dont wanna loose any data itried updating via ota and cwm via zip
Getting status 7 error kindly help me out solving this issue without loosing data
Sent from my Nexus 7 using Tapatalk HD

pleasant said:
Well i have rooted nexus 7 wifi with cwm installed
I wanna update my tablet to android 4.3 and dont wanna loose any data itried updating via ota and cwm via zip
Getting status 7 error kindly help me out solving this issue without loosing data
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
Do backup of your apps with Titanium backup. backup your SDCARD to a PC, wipe, flash fresh 4.3 and then restore data/apps... you can't use OTA because it checks your system for modifications.... it is good to wipe a device once in a while anyway, especially if you tweak it a lot

dalanik said:
Do backup of your apps with Titanium backup. backup your SDCARD to a PC, wipe, flash fresh 4.3 and then restore data/apps... you can't use OTA because it checks your system for modifications.... it is good to wipe a device once in a while anyway, especially if you tweak it a lot
Click to expand...
Click to collapse
Well i havent done any tweaks i had installed dr beats mod since then it has become issue to update via ota
Last time while updating 4.2.2 i was having the same issue but some guy over here helped me updating it to 4.2.2 via zip file and the good part was it didnt gave any status7 error neither it wiped any of my data
I dont wanna connect the device to pc for just update though i have made backup via rom manager do i need to make backup using titanium backup as well ?
Sent from my Nexus 7 using Tapatalk HD

Yes. Dalanik's suggestion is that you backup your apps and data, then wipe, then flash 4.3, then restore apps and data. To do this, you need a backup of your apps and data alone, without the Rom. That's what titanium backup does. If you were to try this with the Nandroid backup you made using Rom manager, you'd just end up back where you started.

pleasant said:
Well i havent done any tweaks i had installed dr beats mod since then it has become issue to update via ota
Last time while updating 4.2.2 i was having the same issue but some guy over here helped me updating it to 4.2.2 via zip file and the good part was it didnt gave any status7 error neither it wiped any of my data
I dont wanna connect the device to pc for just update though i have made backup via rom manager do i need to make backup using titanium backup as well ?
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
Well, yes, beats mod qualifies as a "tweak" or a changed system
Yes, I know what you;'re saying, with 4.2.2 I think somebody posted modified OTA zip and it didn't check for changes (or not ALL anyway) I updated like that too, because I didn't want to lose my data. But now I just did Titanium and reset the whole thing.
IF you mean nandroid backup, that is good, but that is the image of your whole system. You need backup of each application so you can restore them.
What I did is just waited for most of the apps to re-install from the google play automatically and then restored the rest from Titanium.

Nexus 4 update problems 4.3 - 4.4

Hey guys, I'm having some trouble updating and its been about a year since I rooted and forgot most of this stuff. Could someone make it very easy for me to update I have super Su and titanium backup also CWM recovery, I would like to not lose my data on phone and could re root if needed. Also have the ABD on the computer. I know I need to flash the stock information but I'm having a hard time finding that information on the forums.

Look here
http://forum.xda-developers.com/showthread.php?t=2698139
Unleashed by my Nexus 4