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[Q] Need help flashing img via Fastboot - am I bricked?

Had just flashed the latest CM9 nightly (clean install, fresh wipe) yesterday and everything was running fine.
This morning, woke up, my phone was turned off. When powering it on it hung on the google screen. Fastboot still working, booted into recovery only to find that I would get error messages when trying to load my backs "E:unable to mount /sdcard". Apparently it also couldn't mount /data. So I was unable to flash any images or restore or boot up.
Seeing that fastboot was still working I assume I'm not bricked yet. I tried flashing a new boot and cwm recovery via fastboot - no dice. Same errors.
I don't have a recent backup of anything in sdcard, but at this point I'm willing to sacrifice it.
Found this thread http://forum.xda-developers.com/showthread.php?t=1078213
and I'm trying to follow the steps to flash back to stock GB. using the GRJ22 images
It flashed the boot and recovery without issue but seems to hang while flashing the system.img. I know it's a big file, but it was up to ~2hrs with it still transferring. I pulled the plug on it and tried again, lost patience after an hour.
Now I had the idea of maybe locking and unlocking the boot loader would help things.....not sure why I thought this. Anyway, now it seems to hang on the unlock bootloader screen.
So my question now - am I screwed?
- anything else to try?
- is it really "hanging" or do I need to give it more time?
- have I screwed myself even more by now locking my bootloader and flashing the stock recovery?
Any help would be very much appreciated....

Some new additions and new insights from the reddit android community:
- this probably has nothing to do with CM9. My phone has been wonky for about two weeks - random reboots, sometimes rebooting into recovery. That's why I thought I'd throw on the latest nightly and do a fresh wipe yesterday.
- There's definitely something up with /data. Anytime I tried wiping all/factory reset in cwm recovery I got errors about not being able to mount /data or being able to find files in /data
- basically anything I do involving /data partition causes the phone to lock-up -- flashing the boot.img and recovery img worked, but not system. Also, I think the reason I can't re-unlock the bootloader is because during the unlock process it tries to do a factory reset/data wipe
Basically I think there are two things I need to know if I can do - 1) unlock the bootloader again, via some way that won't try to reset the /data partition and thus won't freeze the phone. 2) try repartitioning /data
I really hope I didn't screw myself by locking the bootloader. I'd actually feel a lot better if it was something in my phone that just failed hardware-wise rather than something I could've fixed if I wasn't too quick to try poorly thought out ideas.....
Any help at all would be appreciated!

Possibly (and likely) a corrupted nand flash. Fairly common problem sadly. I'd say it's a good thing your bootloaders locked, no dramas sending it back to samsung. It might've been possible to reset the partitions and flash fastboot images but i don't think i've seen anyone who has done this to sort any similar problem. Hopefully your phones still under warranty

Well thank God that it turns out that I'm still on warranty.....sending the phone back to Samsung tomorrow.
Like you said, it's actually a good thing the bootloader is now locked and the stock boot img and recovery img are now back on! Hopefully this makes it more likely that they weren't turn away my phone.

I've yet to hear someone not getting work done under warranty because of an unlocked boot loader but it's always good to have it as stock as can be. Hope they don't take too long with your phone.

Harbb said:
I've yet to hear someone not getting work done under warranty because of an unlocked boot loader but it's always good to have it as stock as can be. Hope they don't take too long with your phone.
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I bricked my nexus s 4 days before Christmas last year... and i was using a custom rom obviously with an unlocked bootloader and custom recovery image, and i handed it to vodafone, and guess what? they repaired without asking any questions, and the day before Christmas! sooo happy maybe because i was thirteen then, they didn't suspect a thing

Restore stock rooted vs Odin to stock

So I need to return my Galaxy S3 back to Verizon because the headphone jack broke and thinks that headphones are constantly connected. My problem is I just don't want Verizon to know I've been installing Roms etc. Do you think I can get away with just restoring my phone back to my Stock Rooted backup and deleting superuser or should I go all the way back and ODIN to stock completely?

Odin back to stock and wipe/data factory reset from stock recovery...only takes 10min and could save you hundreds on car insurance!

Failed
droidstyle said:
Odin back to stock and wipe/data factory reset from stock recovery...only takes 10min and could save you hundreds on car insurance!
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I tried that and fail on loading the “stock.vzw_root66.tar” file. I cannot get any further.

OK post your problems on the new emergency thread and we will help you. No need to hijack someone's thread with your problem. As for the op's dilemma like droidstyle said odin to a stock ROM not the root66 stock ROM since you are returning your phone so no traces of rooting are found.

[Q] Is my phone still unlocked?

So here’s my story. I was playing around with my phone on CleanROM and noticed that I was unable to get to extended network anymore. So I backed up my phone and Odined back to stock. After having a minor panic attack when Odin failed a few times, I finally got the image to push through. Booted up and still was unable to get connected to extended network. So then I reprovisioned my SIM card. Booted back up an finally was able to see extended network again . I then rooted my phone again and restored my backup and all is still working.
Now since I unlocked the bootloader before going back to stock and now restored my backup, is my phone still unlocked? When I open EZ-Unlock, it still shows as unlocked, but I thought that I would ask here too just to make sure.

i figured you wouldnt be only because going back to stock it should put that boot image back on thats locked... not sure either

Yup
:thumbdown:
:beer:

Yes you need to unlock the bootloader after odining a stock package everytime!

Thanks for the replies! I cleared the app data for EZ unlock and it switched to unknown so it must not actually check to see if it's done, it just remembers what it has done already.

[Q] NFC issue, tried everything.

The usually story, while flashing my NFC somehow managed to disappear, so I went back and flashed to ICS stock and it hasn't allowed me to turn it on either, did a complete lock and flashed complete stock, I have factory reset, wiped, flashed and re-flashed. Any sort of ideas? Anything would help seeing as this has been keeping me up and I feel like I have tried almost every fix NFC related.

Mexi7 said:
The usually story, while flashing my NFC somehow managed to disappear, so I went back and flashed to ICS stock and it hasn't allowed me to turn it on either, did a complete lock and flashed complete stock, I have factory reset, wiped, flashed and re-flashed. Any sort of ideas? Anything would help seeing as this has been keeping me up and I feel like I have tried almost every fix NFC related.
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Click to collapse
Have you tried reprovisioning? As far as I know most people use it to restore service after a bad flash that didn't wipe their IMEI but for some reason it still won't connect to the network. The only reason I bring it up is because that's not its only use, while using Odin to go back to stock works this is supposed to wipe everything and reset everything, not just data but the whole damn phone. I would just give it a try since you've done everything else. Like I said above. Its mainly used for getting data back when your IMEI isn't lost but it does way more than that. It sounds like faulty hardware but this can't hurt to try.
To reprovision you need to be on stock TW and then you need to dial*2767*3855# . Just note that this will wipe everything so get everything off your internal SD you wanna keep.
Sent from one of the many Anthropomorphic Personalities of the Disc

Please help, stuck in Bootloop !!

Recently I unlocked bootloader, installed twrp and succesfully rooted my device, but while I was tinkering with my device I accidentally wipe all data, partition, etc in TWRP now I guess I wiped out everything including OS !!!
How can I restore ? Do I need to flash new hammerhead image ?
Right now I'm following this tutorial
http://forum.xda-developers.com/showthread.php?t=2513701
It'll be great if anyone of you can point me right way.

You can just flash any custom rom using this
http://forum.xda-developers.com/showthread.php?t=2575150
Or
Follow the thread you posted to restore a factory image..
But restoring a factory image will unroot your device..

You have twrp so the first thing you did was make a nandroid, right? Live and learn.

Thanks for the help, I just flashed new image. Everything works good except wifi, random drops + slow speed.
I contacted google for replacement and they send me RMA form. Unrooted the phone, bootlocker locked + flag reset.

Thanks for the help, I just flashed new image. Everything works good except wifi, random drops + slow speed.
I contacted google for replacement and they send me RMA form. Unrooted the phone, bootlocker locked + flag reset.

Huh? You're doing an RMA why?
sent from my hammerhead

albertpaulp said:
Thanks for the help, I just flashed new image. Everything works good except wifi, random drops + slow speed.
I contacted google for replacement and they send me RMA form. Unrooted the phone, bootlocker locked + flag reset.
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Why are you rma'ing it. Was wifi messed up before you erased everything?

jd1639 said:
Why are you rma'ing it. Was wifi messed up before you erased everything?
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Before rooting wifi problem was rarely occur now after rooting problem arise more frequently, now even after unrooting wifi is super slow sometimes not even connecting. I hate RMAing but seems like no other way.
http://forum.xda-developers.com/showthread.php?t=2586410

jd1639 said:
You have twrp so the first thing you did was make a nandroid, right? Live and learn.
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Awesome advice. I made a nandroid of my N5 first thing after getting all my apps straight. Playing with flashing a rom in TWRP I did a manual "wipe data" which proceded to wipe out the entire SDCARD in the process including my nandroid. Sooooo.... Yes, make a nandroid but also back it up to your computer or dropbox right away.

albertpaulp said:
Before rooting wifi problem was rarely occur now after rooting problem arise more frequently, now even after unrooting wifi is super slow sometimes not even connecting. I hate RMAing but seems like no other way.
http://forum.xda-developers.com/showthread.php?t=2586410
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Click to collapse
Don't RMA it, there's nothing wrong with the hardware. All you have to do is reflash the factory image. If you didn't know what you were doing, you shouldn't have been messing around with your phone in the first place. Reflash your phone back to its factory state and next time do your homework before you start tinkering. People like you are going to cause Google to change their return policy so that returns are much more heavily scrutinized.

BirchBarlow said:
Don't RMA it, there's nothing wrong with the hardware. All you have to do is reflash the factory image. If you didn't know what you were doing, you shouldn't have been messing around with your phone in the first place. Reflash your phone back to its factory state and next time do your homework before you start tinkering. People like you are going to cause Google to change their return policy so that returns are much more heavily scrutinized.
Click to expand...
Click to collapse
Before rooting wifi problem was rarely occur now after rooting problem arise more frequently, now even after unrooting wifi is super slow sometimes not even connecting. I hate RMAing but seems like no other way.
Click to expand...
Click to collapse
You know how to read right ? also I did reflashed to stock image and unrooted + locked bootloader but problem persists, what do you propose I do now ? I started loving my phone now I'm getting new one, it's hard for me too, it's like adopting a son.