Hi everyone I was just wondering if its possible to downgrade my nexus from 4.2.1 to 4.1.2 if I'm not rooted. I'm currently not interested in rooting my device so is there a way to do it without rooting/unlocking?
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Follow this http://m.pocketnow.com/2013/01/29/how-to-flash-nexus-to-stock
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desiresiscool said:
Follow this http://m.pocketnow.com/2013/01/29/how-to-flash-nexus-to-stock
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I can't flash things because I'm unrooted. So I don't think this method will work. Correct me if I'm wrong.
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Anyone know?
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I do not know for sure but I quite doubt it.
I am curious as to why you want to though. Not that there's anything wrong with wanting to downgrade, of course.
Have you tried one the took kits available? Check around in the Nexus 7 original development section. Look for Wuggs.
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Droid117 said:
Have you tried one the took kits available? Check around in the Nexus 7 original development section. Look for Wuggs.
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I looked at his toolkit but it basically says that I have to root in order to even use the toolkit so is there a way to downgrade without having to go through that rooting process? For now, I don't want to root my nexus
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Don't try to root it you'll only manage unlocking the boot loader then when you try and root it it will get stuck in fast boot mode I tried about every rooting program but it could be because my Comp is running windows xp lol
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served24 said:
I looked at his toolkit but it basically says that I have to root in order to even use the toolkit so is there a way to downgrade without having to go through that rooting process? For now, I don't want to root my nexus
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It's so easy to just reflash stock and relock the bootloader that you really have nothing to worry about. If you want unrooted stock 4.1.2 just unlock the bootloader, then flash the stock image of 4.1.2, then relock the bootloader after. It's a really simple process.
dstryrwiz said:
It's so easy to just reflash stock and relock the bootloader that you really have nothing to worry about. If you want unrooted stock 4.1.2 just unlock the bootloader, then flash the stock image of 4.1.2, then relock the bootloader after. It's a really simple process.
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Doesn't this void the warranty though? I know it did when i rooted my phone.
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Is this even possible or should I stop furthering this question?
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served24 said:
Doesn't this void the warranty though? I know it did when i rooted my phone.
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If i'm not mistaken, as long as you flash back to 4.2.1(which is the os it came with when u got it out of the box), and then re-lock the bootloader, unroot, then your warranty wont be voided mate. hope I helped.
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JohnMacky said:
If i'm not mistaken, as long as you flash back to 4.2.1(which is the os it came with when u got it out of the box), and then re-lock the bootloader, unroot, then your warranty wont be voided mate. hope I helped.
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Yeah, I've done this plenty of times with my Nexus 7 and even the Verizon Galaxy Nexus. As long as you're on a stock image with a locked bootloader, they won't give you any trouble or claim you voided your warranty, as there's really no way to tell. I've gotten into the habit of unlocking and rooting my device as soon as I get it, and if I find a problem I just revert back to a stock image, relock the bootloader, then send it back in. I have yet to have a single issue.
dstryrwiz said:
Yeah, I've done this plenty of times with my Nexus 7 and even the Verizon Galaxy Nexus. As long as you're on a stock image with a locked bootloader, they won't give you any trouble or claim you voided your warranty, as there's really no way to tell. I've gotten into the habit of unlocking and rooting my device as soon as I get it, and if I find a problem I just revert back to a stock image, relock the bootloader, then send it back in. I have yet to have a single issue.
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How do you save your stock image?
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served24 said:
How do you save your stock image?
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You don't need to worry about saving your stock image. The person above you is talking about saving the stock image to return to after flashing a custom ROM.
There is no way to revert back to 4.1.2 without root access. Doing a factory reset, about the only thing you can do without root, will only return you back to stock 4.2.1
My advice just stay on 4.2.1 whatever your issue is with it.
Otherwise use a toolkit. You will need a PC and the 4.1.2 image. Wugfresh has a website. I would start there.
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ezas said:
You don't need to worry about saving your stock image. The person above you is talking about saving the stock image to return to after flashing a custom ROM.
There is no way to revert back to 4.1.2 without root access. Doing a factory reset, about the only thing you can do without root, will only return you back to stock 4.2.1
My advice just stay on 4.2.1 whatever your issue is with it.
Otherwise use a toolkit. You will need a PC and the 4.1.2 image. Wugfresh has a website. I would start there.
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I actually was just referring to the stock images you can get directly from Google or from goo.im. It's easy enough to just use the 4.2.1 stock image from Google to just restore back to how it shipped, and then relock the bootloader.
served24 said:
Hi everyone I was just wondering if its possible to downgrade my nexus from 4.2.1 to 4.1.2 if I'm not rooted. I'm currently not interested in rooting my device so is there a way to do it without rooting/unlocking?
Sent from my Nexus 7 using xda app-developers app
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dstryrwiz said:
It's so easy to just reflash stock and relock the bootloader that you really have nothing to worry about. If you want unrooted stock 4.1.2 just unlock the bootloader, then flash the stock image of 4.1.2, then relock the bootloader after. It's a really simple process.
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Completely agree with this... I have, on several occasions, reflashed stock, switching between 4.1.2 and 4.2.1 - (for me, it was more of an exercise in learning about fastboot and adb... and making sure I had TRIED AND TESTED factory images on my laptop as contingencies should anything go wrong when I came to start flashing custom ROMs).
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You don't need root to flash a factory image... everything is done with fastboot; with the Nexus 7 in FASTBOOT/BOOTLOADER mode (from complete shutdown, press and hold Volume Down button... whilst holding, press the Power Button).
(Root is meaningless anyway, here in FASTBOOT/BOOTLOADER mode, since /dev/block/mmcblk0p3, the SYSTEM partition, hasn't even been mounted yet - so no SU binary available... whether or not it exists, it's sort of irrelevant).
- here, for example, is the flash-all script from 4.1.2 (nakasi-jzo54k)... (Nexus 7, WiFi model only).
Code:
fastboot erase boot
fastboot erase cache
fastboot erase recovery
fastboot erase system
fastboot erase userdata
fastboot flash bootloader bootloader-grouper-3.41.img
fastboot reboot bootloader
sleep 10
fastboot -w update image-nakasi-jzo54k.zip
After running this script (flash-all.bat if in Windows, or flash-all.sh if an Apple user) you can optionally choose to lock the bootloader with... (if you're concerned about warranty issues).
Code:
fastboot oem lock
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If it was the case you needed root to run...
Code:
fastboot flash [partition to be flashed] [IMG file to flash]
...you wouldn't be able to flash a CUSTOM RECOVERY like CWM or TWRP... and thus, you wouldn't be able to flash Chainfire's UPDATE-SuperSU-v1.00.zip (http://download.chainfire.eu/310/SuperSU/UPDATE-SuperSU-v1.04.zip) in order to gain root in the first place!... (you see the paradox!).
Rgrds,
Ged.
Hi!
I want to root my Nexus 7 with unlockroot but I know that then warranty won't work anymore. But if I unroot then my warranty will work again. So my question is.. When I root my Nexus and when somethong happens (like not turning on anymore or etc.) then I can't unroot it? It means that warranty won't work and I have to fix it by myself or take it to some business who does things like this.
Just use one of the nexus toolkits and you can unroot or relock bootloader, whatever you want.
What toolkit do you suggest using? Because I just ordered a new 16 gb Wi-Fi version
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As far as I know they are both as good as each other. It seems to be down to your UI preference. I use mskip's toolkit, but other's prefer Wug's.
So if my Nexus 7 is not turning on I can easily relock bootloader and unroot?
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AW: Rooting Nexus 7 16GB
jeremin said:
So if my Nexus 7 is not turning on I can easily relock bootloader and unroot?
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Exactly
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Wat from do you guys suggest starting out with
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jeremin said:
So if my Nexus 7 is not turning on I can easily relock bootloader and unroot?
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How would anybody do anything to a device that can not be turned on?
Perhaps you meant "won't boot", but who knows really.
If you experience a hardware failure or do something dumb like flash junk to the bootloader (or erase it without flashing a valid one before exiting the currently-running bootloader), then nobody here can guarantee you anything at all.
There have been a couple of reports on here of devices which developed apparent hardware troubles which did not totally brick the device (that is, the unlocked bootloader state could still be observed), but apparently wrecked things to the point that no currently known techniques could rescue the device or relock the bootloader.
Having said that, there have been even more reports of newbs doing stupid stuff and bricking their devices. Interpret that any way you like; I interpret it to mean the owner bricking the device is more likely than it being caused by hardware failure.
Until there is something like "nvflash" for the N7 (might never happen), the N7 should not be considered to be unbrickable (say compared to Samsung devices that work with Kies/heimdal).
good luck
Hi, i bought a nexus 4 and i wanted to know what things should i avoid so i wont brick my phone before i do anything for example while rooting ,flashing a rom ? sorry for my english bthw
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Don't flash anything from another device.
Read the instructions carefully to install/flash a rom or kernel.
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scream4cheese said:
Don't flash anything from another device.
Read the instructions carefully to install/flash a rom or kernel.
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+1 That`s about the only thing to brick a Nexus
Don't do any formatting, and don't delete partitions. If you need a clean slate, do a factory reset or flash the stock image using fastboot.
snapper.fishes said:
Don't do any formatting, and don't delete partitions. If you need a clean slate, do a factory reset or flash the stock image using fastboot.
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The only thing you can't format is the bootloader that will brick it
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Yep avoid flashing stuff for other devices. Most things will be recoverable but some can brick it. E.g. recoveries
Never ever use the command fastboot erase bootloader as this will 100% be a brick
I haven't seen anyone do it on the nexus 4 however i have seen people do it on the nexus 7
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Just began the RMA process with Google Play by ordering the replacement device. Now when I send back my faulty unit when the replacement arrives, in what state should I leave the software of the phone so that the RMA process finishes smoothly?
I'd imagine I'd have to flash stock rom+kernel, stock recovery, relock the boot loader, unroot, and possibly reset the flash counter (have no idea how to go about this last one). Anything I'm missing/feedback?
This is my first time going through Google's RMA process and I want it to happen as smoothly as possible. Thank you.
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Nexus phones dont have flash counters. All you need to do is flash the stock images and relock the bootloader.
A guide can be found here: http://forum.xda-developers.com/showthread.php?t=2010312
I've never heard about a flash counter on a nexus
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Chromium_ said:
Nexus phones dont have flash counters. All you need to do is flash the stock images and relock the bootloader.
A guide can be found here: http://forum.xda-developers.com/showthread.php?t=2010312
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You learn something new everyday. Thanks guys!
Lord Yurij said:
I've never heard about a flash counter on a nexus
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OK, back when kit Kat first come out I flashed a updated boot loader and when I rebooted the phone will no longer turn on. All I get is a red light. It seems I had a corrupted file. I can not get into recovery, and it seems I can't get into download mode either.
So here is my question. I read somewhere I can JTAG this phone and that will fix it. I'm unfamiliar with JTAG process so that's why I'm asking here.
Also, is there any other options?
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If you tried to flash a bootloader you most likely hard bricked your phone. Do you have a link to what you flashed? If you have to jtag check out mobiletechvideos.com. they've gotten very good reviews.
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jd1639 said:
If you tried to flash a bootloader you most likely hard bricked your phone. Do you have a link to what you flashed? If you have to jtag check out mobiletechvideos.com. they've gotten very good reviews.
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I don't have the link because it was almost a year ago. I'm using a nexus 5 now but want to save this phone if possible. I'll check that out. Thanks
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Did you unlock the bootloader before flashing a new bootloader? I'm not sure if this makes a difference.
audit13 said:
Did you unlock the bootloader before flashing a new bootloader? I'm not sure if this makes a difference.
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Yes, I was running PA ROM at the time. Its possible I flashed a boot loader for another phone. Lol it was early in the morning, and it was totally my fault. I'm just looking for a way to save it because its in mint condition, not even a scratch on it.
So if JTAG is the only option, I'll gladly pay for it as long as it will work.
But I was told with JTAG, or motherboard replacement is required to fix what was done.
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