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Removed OS, How do i reinstall the stock ROM?

Hello
First of all, let me explain the situation:
My phone is the Oneplus One, currently with no OS, the reason being - because i wanted to re-root my phone after the Oneplus updated (this update was a while ago) either way many problems occurred and i figured the easiest way to re-root my device is to simply wipe it, and try again on a clean slate.
I attempted to wipe my phone, but did it the complete wrong way. Instead of using the OS's wiping strategy, i may of used the recovery's one instead, doing so i clean swooped the OS right off my phone.
At the moment, the phone has no OS installed - nor is the phone rooted. The phone isn't capable of passing files over through usb debugging because the computer doesn't recognise it no more. (It did have usb debugging turn't on). Of course i need to reinstall an OS on the phone. The TWRP recovery is working fine. But i do not know how to do it. I looked up things such as mounting, didn't really understand the vague explanations given by the helpers of this forum (i am slow haha ). If someone is able to point me in the right direction in how to simply put an OS back into the phone some how i would be grateful.
I did read up on one post that suggested making a system.img placing the OS inside and flashing it over using fastboot mode. Which brings me to the question. Is it possible to use command to install an OS on my Oneplus whilst in fastboot mode?

RazorCJ123 said:
Hello
First of all, let me explain the situation:
My phone is the Oneplus One, currently with no OS, the reason being - because i wanted to re-root my phone after the Oneplus updated (this update was a while ago) either way many problems occurred and i figured the easiest way to re-root my device is to simply wipe it, and try again on a clean slate.
I attempted to wipe my phone, but did it the complete wrong way. Instead of using the OS's wiping strategy, i may of used the recovery's one instead, doing so i clean swooped the OS right off my phone.
At the moment, the phone has no OS installed - nor is the phone rooted. The phone isn't capable of passing files over through usb debugging because the computer doesn't recognise it no more. (It did have usb debugging turn't on). Of course i need to reinstall an OS on the phone. The TWRP recovery is working fine. But i do not know how to do it. I looked up things such as mounting, didn't really understand the vague explanations given by the helpers of this forum (i am slow haha ). If someone is able to point me in the right direction in how to simply put an OS back into the phone some how i would be grateful.
I did read up on one post that suggested making a system.img placing the OS inside and flashing it over using fastboot mode. Which brings me to the question. Is it possible to use command to install an OS on my Oneplus whilst in fastboot mode?
Click to expand...
Click to collapse
See section 8 of my guide:
http://forum.xda-developers.com/showthread.php?t=2839471

[Completed] Team win recovery project on note 4: can i get it off?

I don't now how TWRP got installed on my almost brand new 950$ note 4, but it did and it's made the thing completely useless. It voided my warranty obviously, I can't get my pictures and stuff off it (which is important to me, as they are all of my son), it won't open past the TWRP page, so can anyone give me advice? Is there a way to uninstall it and get my phone to normal again?

Hello,
Welcome to XDA.
Believe it or not, TWRP is actually a good thing for you to have, it is a powerful tool that can be used to get your device working normally again. TWRP can not accidentally install itself, it requires a technical process that involves a series of steps that can only be intentional, whether you are aware that they did it or not. I recommend leaving it there and using it to fix the device and continue to leave it there after you get it fixed. It serves the same purpose as the Windows restore points on your PC if you have one, it can be used to restore your device to exactly what was installed before this booting issue started. That is IF whoever installed TWRP made a backup(i.e. restore point) of your stock firmware before this booting issue showed up.
For instructions on how to use TWRP to fix your device, how to find the backup if one was made and how to use it to fix the device, post your questions about these points in the thread linked below.
http://forum.xda-developers.com/note-4/help
The experts there may be able to help.
Register an XDA account to post and reply in the forums.

How does a non-techy get Cyanogenmod installed on a Samsung Galaxy Ace 3?

Apologies if this is not really the place for this question but I don't know where else to go for an answer. I have just purchased a Z1 after years of putting up with Samsung bloatware etc and it has changed my life! I would like to transform my wife's phone experience as well. She can only really use a small phone and has been happy with her Ace 3 until recently, when it started to get slow and erratic. In desperation she has bought an iPhone 5 but this has not been a happy experience at all! I cannot find any new small Android phones that come with Cyanogen pre-installed so I am wondering if we can get it installed on her old Ace 3. From the discussions in this forum I guess this can be done but, not having any technical training in this subject, I really dont understand much of what is being said. I have no idea how to go about this.
So is there either a very simple manual on what to do or else a UK-based expert who can do this for me (for a fee, obviously)?

you can look from the android development section. but, it may vary to your phone model. there is a instructions to on how to install a cyanogenmod os on your ace 3. at least you are familliar with custom recoveries like cwm or twrp, you should install it first on your phone via odin in your pc.

You guys know so much
Hi, PAPlinskie, and thanks so much for getting back to me. I really appreciate it. I have looked at the page you refer to and I just don't understand it! (I don't know what cwm or twrp or Odin are) I guess you guys don't realise just how much you know. I suspect that the answer to my question is probably that there isn't an absolute layman's guide so I will probably have to look for someone to do it for me. Thanks for trying anyway.

Garth Horigan said:
Hi, PAPlinskie, and thanks so much for getting back to me. I really appreciate it. I have looked at the page you refer to and I just don't understand it! (I don't know what cwm or twrp or Odin are) I guess you guys don't realise just how much you know. I suspect that the answer to my question is probably that there isn't an absolute layman's guide so I will probably have to look for someone to do it for me. Thanks for trying anyway.
Click to expand...
Click to collapse
At first I didn't want to flash Custom ROM's on my phone for fear of breaking it... But All I had to do was just follow instructions to the "T" and I had no hiccups...
Okay, so lemme clear some things up for you.
Odin is an Application which you run on a Windows machine, (Your PC). It serves as a bridge to allow you to put custom software such as custom recoveries and allows you to fix a broken device (If the software is the problem)
TWRP & CWM are both custom recoveries. You can think of the stock recovery mode in Android like Safe Mode in Windows, It allows you to Wipe your entire phone or perform other recovery options if you are unable to access the phone when you turn it on. A custom recovery allows all these functions, but on top of that, allows you to flash (install) files to your phone, Like your CyanogenMod.
In a nutshell, if you want CyanogenMod on your Ace 3, you will have to:
1. Install drivers on your PC so that it recognises your phone
2. Using ODIN, flash a custom Recovery
3. Download a CyanogenMod port found here on the forums.
4. Install (Flash) it in your Custom recovery.
The guides here on XDA are really good, all you have to do is do your homework, read, understand and you will have no problems.
Good Luck with your quest on Custom ROMS:good:

The coward's way out!
Sayrian said:
At first I didn't want to flash Custom ROM's on my phone for fear of breaking it... But All I had to do was just follow instructions to the "T" and I had no hiccups...
Okay, so lemme clear some things up for you.
Odin is an Application which you run on a Windows machine, (Your PC). It serves as a bridge to allow you to put custom software such as custom recoveries and allows you to fix a broken device (If the software is the problem)
TWRP & CWM are both custom recoveries. You can think of the stock recovery mode in Android like Safe Mode in Windows, It allows you to Wipe your entire phone or perform other recovery options if you are unable to access the phone when you turn it on. A custom recovery allows all these functions, but on top of that, allows you to flash (install) files to your phone, Like your CyanogenMod.
In a nutshell, if you want CyanogenMod on your Ace 3, you will have to:
1. Install drivers on your PC so that it recognises your phone
2. Using ODIN, flash a custom Recovery
3. Download a CyanogenMod port found here on the forums.
4. Install (Flash) it in your Custom recovery.
The guides here on XDA are really good, all you have to do is do your homework, read, understand and you will have no problems.
Good Luck with your quest on Custom ROMS:good:
Click to expand...
Click to collapse
I have taken the coward's way out. I went into my local neighbourhood PC techie shop and asked if they knew of a reliable local phone engineer who could install Cyanogen for me. The boss' assistant said he does that sort of thing for a hobby and was happy to do it for me in return for a donation to his drone fund! He seems to made a cracking job of it and my wife is overjoyed to have her Ace back in a turbo-charged state.
Many thanks for your help and I am only sorry I was not brave enough to act on it.

Garth Horigan said:
I have taken the coward's way out. I went into my local neighbourhood PC techie shop and asked if they knew of a reliable local phone engineer who could install Cyanogen for me. The boss' assistant said he does that sort of thing for a hobby and was happy to do it for me in return for a donation to his drone fund! He seems to made a cracking job of it and my wife is overjoyed to have her Ace back in a turbo-charged state.
Many thanks for your help and I am only sorry I was not brave enough to act on it.
Click to expand...
Click to collapse
It's okay. We all know how daunting these things can be because you don't want to brick your device.
Maybe in the future you will be able to try it yourself.

Stuck in TWRP (Recovery)

Hello everyone, I hope I'm writing in the right section.
I'll go straight to the issue: after finally deciding to install a custom rom on my device (HUAWEI GX8), i decided to opt for this one: https://forum.xda-developers.com/moto-g4-plus/development/rom-aospextended-rom-v3-0-t3537792
The first problem i had to face was the "ERROR:7" (so the rom seemed to be made for a different phone than mine) that occured while installing the rom in the twrp, but being that the rom was specifically made for my phone I followed this guide: https://www.youtube.com/watch?v=wed03948gcg and fixed the issue, resulting in a perfect installation... or so I thought.
After rebooting, the phone didn't start the os but was stuck in the twrp (I tried rebooting multiple times and in different ways of course).
Being that I had made a backup before installing the new rom, I decided to restore that backup from the twrp... but still the phone is stuck in the twrp and I don't know what to do :crying:
I hope somebody can help me because I'm starting to panicking.
Cheers in advance.
PS: I'm a complete newb so this was the first time I installed a custom rom, I tried searching for this problem online but couldn't find a solution that fitted me. I hope I won't ask too many stupid questions.

SlimeAndroid said:
Hello everyone, I hope I'm writing in the right section.
I'll go straight to the issue: after finally deciding to install a custom rom on my device (HUAWEI GX8), i decided to opt for this one: https://forum.xda-developers.com/moto-g4-plus/development/rom-aospextended-rom-v3-0-t3537792
The first problem i had to face was the "ERROR:7" (so the rom seemed to be made for a different phone than mine) that occured while installing the rom in the twrp, but being that the rom was specifically made for my phone I followed this guide: https://www.youtube.com/watch?v=wed03948gcg and fixed the issue, resulting in a perfect installation... or so I thought.
After rebooting, the phone didn't start the os but was stuck in the twrp (I tried rebooting multiple times and in different ways of course).
Being that I had made a backup before installing the new rom, I decided to restore that backup from the twrp... but still the phone is stuck in the twrp and I don't know what to do :crying:
I hope somebody can help me because I'm starting to panicking.
Cheers in advance.
PS: I'm a complete newb so this was the first time I installed a custom rom, I tried searching for this problem online but couldn't find a solution that fitted me. I hope I won't ask too many stupid questions.
Click to expand...
Click to collapse
The ROM that you flashed was NOT made specifically for your device, you have HUAWEI GX8, the ROM was made for Moto G4 Plus. You would have know this if you had looked at the forum it was posted in. It was posted in in the Moto G4 forum, not in a Huawei forum.
The "fix" that you used didn't help.it successfully flash, it only help you "force" the ROM to flash. You bypassed a safety measure that was designed to keep you from flashing the wrong thing, now you're dealing with the results of forcing it to flash on a device it wasn't meant for.
Learn to pay attention to what you are reading.
You need to flash your stock firmware to fix this.
I DO NOT PROVIDE HELP IN PM, KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE

Droidriven said:
The ROM that you flashed was NOT made specifically for your device, you have HUAWEI GX8, the ROM was made for Moto G4 Plus. You would have know this if you had looked at the forum it was posted in. It was posted in in the Moto G4 forum, not in a Huawei forum.
Learn to pay attention to what you are reading.
You need to flash your stock firmware to fix this.
I DO NOT PROVIDE HELP IN PM, KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE
Click to expand...
Click to collapse
I'm sorry I may have linked the wrong page, either way on the website of the rom I downloaded the right thing, I'm sure about it because I checked it multiple times (the error I made in writing the post may be cause by me panicking, sorry :crying: ).
While waiting for answers I installed a different twrp and it WORKS! I'm so happy I could cry. Thank you nonetheless for your help (Still dunno what the problem was though xD)

@SlimeAndroid as you installed ROM of different phone, it might not get installed as ROM zip contains script for Mobile verification.
I assume you had wiped /system and after installation of wrong ROM you rebooted your phone without reading if TWRP said you don't have any OS installed or what. (That means you have ran without any OS, that may be reason why you stuck with TWRP.)
But after Restoring Backup of Working ROM, it should boot your device, but it doesn't.
We (on G4 plus) have faced issue: when phone start, it always goes to TWRP/recovery instead of booting to system.
Are you facing similar ?
Solution for this problem was to clear bootloader data, by using fastboot commands (i assume you know how to do, otherwise ask for better explanation )
Run this two commands from Comand Prompt
-> fastboot oem fb_mode_set
-> fastboot oem fb_mode_clear
This worked for us. You can try, if doesn't work then flash Stock ROM.

____Mdd said:
@SlimeAndroid as you installed ROM of different phone, it might not get installed as ROM zip contains script for Mobile verification.
I assume you had wiped /system and after installation of wrong ROM you rebooted your phone without reading if TWRP said you don't have any OS installed or what. (That means you have ran without any OS, that may be reason why you stuck with TWRP.)
But after Restoring Backup of Working ROM, it should boot your device, but it doesn't.
We (on G4 plus) have faced issue: when phone start, it always goes to TWRP/recovery instead of booting to system.
Are you facing similar ?
Solution for this problem was to clear bootloader data, by using fastboot commands (i assume you know how to do, otherwise ask for better explanation )
Run this two commands from Comand Prompt
-> fastboot oem fb_mode_set
-> fastboot oem fb_mode_clear
This worked for us. You can try, if doesn't work then flash Stock ROM.
Click to expand...
Click to collapse
If you read the post above yours, you'll see they solved the issue.
I DO NOT PROVIDE HELP IN PM, KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE

You always have to make sure the download is for your model of phone(settings -about) and always make sure the download has properly downloaded and I use md5 checksum as this verifies the download is not courupt.
Sent from my iPhone using Tapatalk

Brick. Stuck at "Qualcomm Crashdump"

Hi all,
My op6 is stuck, unable to reboot normally with the famous Qualcomm Crashdump mode message.
The phone has the bootloader unlocked, with TWRP recovery.
1 day ago I could access the recovery even reboot with the power+volume buttons, but it got to a point where it crashes all the time, unable to do anything.
Currently is only able to enter fastboot mode.
I have heard about the MSMDownload Tool.
- Does this tool keep the files/data in the internal memory?
For me the most important thing is to be able to recover the data.
The qualcom dumpcrash mode returns several different messages like:
- stack-protector kernel stack is corrupted in:--schedule*0xB90/OXOd0 (not exact numbers)
- fatal exceptinforece_signalinject.isra.8
Is there any chance of trying something?
I am extremely anxious and worried about the situation
Please help.

Ganapatya said:
Hi all,
My op6 is stuck, unable to reboot normally with the famous Qualcomm Crashdump mode message.
The phone has the bootloader unlocked, with TWRP recovery.
1 day ago I could access the recovery even reboot with the power+volume buttons, but it got to a point where it crashes all the time, unable to do anything.
Currently is only able to enter fastboot mode.
I have heard about the MSMDownload Tool.
- Does this tool keep the files/data in the internal memory?
For me the most important thing is to be able to recover the data.
The qualcom dumpcrash mode returns several different messages like:
- stack-protector kernel stack is corrupted in:--schedule*0xB90/OXOd0 (not exact numbers)
- fatal exceptinforece_signalinject.isra.8
Is there any chance of trying something?
I am extremely anxious and worried about the situation
Please help.
Click to expand...
Click to collapse
to start: it's good thing that you can get into fastboot mode. From there you should be able to do a complete re-install of your device, e.g. using the official LineageOS instructions.
Now to your situation: unfortunately you don't write too much about it like, is your phone running stock OOS or some custom ROM? If it's a custom ROM I'd say you open a topic in the according thread. Then: how much do you know about flashing recoveries, ROMs etc.
Regarding your data: in your current situation it may be extremely difficult if not impossible to secure any personal data now. How I understand it you cannot access the crucial partitions from the bootloader, at least I never heard of methods to get there. Although, people more knowledgeable than me may know of ways. So I do hope you are having recent backups at hand, on your PC or where-ever.
In that case I would start all over (and that's how I got out of a similar situation several months ago): flash recovery, flash latest OOS to both slots, factory reset / wipe everything (to remove any encrypted data you won't be able to access anyways), flash you ROM of choice incl. other part like GAPPS, if needed, do basic setup and then finally try to recover anything that is in you backups.
I wish you a lot of patience and good luck, you'll need it, I'm afraid.

lm089 said:
to start: it's good thing that you can get into fastboot mode. From there you should be able to do a complete re-install of your device, e.g. using the official LineageOS instructions.
Now to your situation: unfortunately you don't write too much about it like, is your phone running stock OOS or some custom ROM? If it's a custom ROM I'd say you open a topic in the according thread. Then: how much do you know about flashing recoveries, ROMs etc.
Regarding your data: in your current situation it may be extremely difficult if not impossible to secure any personal data now. How I understand it you cannot access the crucial partitions from the bootloader, at least I never heard of methods to get there. Although, people more knowledgeable than me may know of ways. So I do hope you are having recent backups at hand, on your PC or where-ever.
In that case I would start all over (and that's how I got out of a similar situation several months ago): flash recovery, flash latest OOS to both slots, factory reset / wipe everything (to remove any encrypted data you won't be able to access anyways), flash you ROM of choice incl. other part like GAPPS, if needed, do basic setup and then finally try to recover anything that is in you backups.
I wish you a lot of patience and good luck, you'll need it, I'm afraid.
Click to expand...
Click to collapse
Thank you for your reply.
is your phone running stock OOS or some custom ROM?
Click to expand...
Click to collapse
Stock OOS, android 10, last release.
Then: how much do you know about flashing recoveries, ROMs etc.
Click to expand...
Click to collapse
I have basic experience installing customs roms, rooting, twrp, unlock fastboot...following tutorials, of course.
Regarding your data: in your current situation it may be extremely difficult if not impossible to secure any personal data now. How I understand it you cannot access the crucial partitions from the bootloader, at least I never heard of methods to get there. Although, people more knowledgeable than me may know of ways. So I do hope you are having recent backups at hand, on your PC or where-ever.
Click to expand...
Click to collapse
here someone says that in theory it would be possible if you have the usb debugging enable, but silly me I had it open but I deactivated it I think, so I'm not sure if I have access or not.
OnePlus 6 Stuck At "Qualcomm Crashdump" Screen All A Sudden | Data Retrieval Critical
Hi good people at XDA. This is my first post on this website and I am absolutely hoping to receive help from you all to find a way out of the depressing and extremely anxious situation I'm in. I was using my OP6 normally today and while I was...
forum.xda-developers.com
Code:
adb devices
mkdir "C:\RECOVERED_DATA"
adb pull /sdcard C:\RECOVERED_DATA
and then finally try to recover anything that is in you backups.
Click to expand...
Click to collapse
but if I do all that flashing process any backups that are in the internal memory will be erased, right?
I had photos, files, whatsapp chat history, documents...etc and they were all in the internal memory. It is not a great loss but it is important for me to be able to recover it.
in your current situation it may be extremely difficult if not impossible to secure any personal data now
Click to expand...
Click to collapse
for me it is more important to recover the files than to recover the phone. your words are discouraging
I have read other posts and maybe being able to install on top (dirty install) the same rom I have, would leave the system as it, is being able to access my files. Not even installing the whole rom but extracting the boot image from the rom and then installing it. but I don't know if I can install a rom or boot image from fastboot, or if I need to have a working TWRP first.
It is said here:
- https://forum.xda-developers.com/t/...over-without-data-loss.4080725/#post-82257413
- https://forum.xda-developers.com/t/...over-without-data-loss.4080725/#post-82261087

Ganapatya said:
your words are discouraging
Click to expand...
Click to collapse
of course that is not my intention. I just try to be realistic
As I wrote in my post, my knowledge is quite basic. I know what I read , and what I experienced with my different devices. So again: you may find instructions and real-life stories showing you ways out of there.
My experience is that you cannot connect your OP6 phone to your PC via ADB while in bootloader / fastboot mode.
a) It's either one or the other: bootloader <=> fastboot or recovery / system <=> adb. Other devices may have different options but we're not talking about Samsung but about OP.
b) I did some additional research last night but I couldn't find a single source talking about *read* access to user data from fastboot. All you can do there is flash i.e. overwrite partitions
c) keep in mind that most probably your personal data are encrypted. So even if you find a way to access your personal data from bootloader / fastboot you may not be able to read it
d) I never used MSMtool, never had to. But I did some more research about it. It looks as if you could re-flash stock ROM using that tool but to the cost of wiping everything. At least that is what the tutorials I found are saying
That said I'd say you don't have much to lose and can go trying out some things.
From my experience the qualcomm crashdump error can have it's source in a malfunctioning recovery solution; I had that when flashing a wrong TWRP version that would not be in harmony with the previously flashed OOS firmware.
From what I read our devices don't have a separate recovery partition, instead it somehow lives somewhere/somehow in the boot partition (experts: please don't crucify me if that is wrong ). So if that is the case one idea would be to extract the boot image from the stock ROM image then flash that to /boot/ from fastboot. Don't know whether that really works and helps, but in theory you would have a default boot partition and kernel *without* a conflicting recovery solution.
In case you're successful you may be able to boot into system and make backups of everything that's valuable to you.
Again: this is extremely wild guessing here, and you'll have to read in a bit on how to properly extract parts of the ROM image.
I also would *strongly* recommend that you continue asking for help in a more technical thread like the LOS19.1 one or Funk Wizard's thread about unlocking and flashing our OP6.
I wish you all luck you need!

I think your best bet it a HW solution, get someone to:
1. replace the modem IC, it's the possible cause of the qualcomm crash
2. solder a direct connection to the internal memory so you can recover your data