Develop Bugs

[GUIDE] [Huawei Ascend G300] Unlock bootloader and gain root access.

Welcome all Huawei Acend G300 users, this is a full guide prepared by me which will help you unlock your bootloader and not only that but it will help you gain root access for system modifications and root required applications.
Click to expand...
Click to collapse
Keep in mind, this method is not confirmed working if you're running android 2.3.x [ Gingerbread ]. So do not use this if you're running it. Also dual sim ones aren't supported from what I see it tempers with the phone, I haven't tested it but many have reported it doesn't work on dual sims.
Lets get started shall we? Firstly I have gathered up some useful resources that will help you get started. Make sure you read this guide first, from top to bottom. Then continue. As you must have a clear understanding on what you are going to attempt. If you have any queries don't hesitate to ask on the thread itself.
Click to expand...
Click to collapse
I have performed these exact steps and have successfully unlocked my bootloader and rooted the phone. So if you're worried. Don't be. After attempting this I haven't noticed any issues either.
Okay, first of all you will need to download Unlockbootloader ---> View attachment unlockbootloader.zip
Once you have downloaded the said .zip extract the .exe file inside the .zip to your desktop.
Continue by turning on USB debugging on your G300. if its already switched on then skip the part below..
Go into Settings>Developer Options and tick the USB Debugging option.
Once its switched on, plug your phone to the computer using a USB cable.
So far you've downloaded Unlockbootloader, have switched USB debugging on, and your phone is connected to your PC.
Now run the .exe file you have just extracted. Click "Root" and let it do everything, it will prompt up with a few warnings saying don't use your keyboard because CMD is running.
Once the setup finishes, your phone should be rooted.
Head into the app drawer, and if you see "SuperUser" you're now officially rooted.
Reboot your phone to finalize the rooting and exploits.
Ok, now for the bootloader.
Once your phone is on, and connected again to the PC with debugging mode on, run the .exe file again and this time click "Unlock BootLoader".
Wait for it to do its job, once done reboot again and you now have a Stock Rooted and Bootloader unlocked ICS phone.
Click to expand...
Click to collapse
If this Guide helped, don't hesitate to hit the thanks button.

I am trying to root my Huawei g300, (from vodaom uk, unlocked) have followed your guide BUT I Have No usb debugging option anywhere under settings. Why? Still awaiting official ics update from vodaom / Huawei, impatiently.
Thanks jon

jon sawyer said:
I am trying to root my Huawei g300, (from vodaom uk, unlocked) have followed your guide BUT I Have No usb debugging option anywhere under settings. Why? Still awaiting official ics update from vodaom / Huawei, impatiently.
Thanks jon
Click to expand...
Click to collapse
Settings>applications>development>usb debug
Sent from my HUAWEI U8815 using Tapatalk 2

Can't Root
When I try and root my device is says "ROOT failure, please check the driver" what should I do?

EmmanuelA said:
When I try and root my device is says "ROOT failure, please check the driver" what should I do?
Click to expand...
Click to collapse
Hi, assuming you have installed the g300 adb drivers, once the device is hanging on the boot logo and you connect the usb cable. You need to wait for windows to fully the load the adb driver before you use the unlockbootloader.exe program.

EmmanuelA said:
When I try and root my device is says "ROOT failure, please check the driver" what should I do?
Click to expand...
Click to collapse
What you have to do is,turn on debug, then power off device fully by pulling off battery then putting it back in, now you must power on by golding the volume down button and power button at the same time, this should get it to be stuck on the huawei logo screen, now plug in your USB cable and wait for you PC to detect the phone and it should automatically install the devices driver's, one its done the now open the folder and run .BAT files, If you are experiencing problems here's a link for another guide : View

Hi,
After the "Unlock BootLoader", my phone doesn't boot. When the logo appears it stars to reboot again and never goes beyond that.
Any ideas ? Have I killed it ?

biscuitpt said:
Hi,
After the "Unlock BootLoader", my phone doesn't boot. When the logo appears it stars to reboot again and never goes beyond that.
Any ideas ? Have I killed it ?
Click to expand...
Click to collapse
Dou you have ics installed or gb. If gb look into my other post above urs.
Sent from my HUAWEI U8815 using Tapatalk 2

krishneelg3 said:
Dou you have ics installed or gb. If gb look into my other post above urs.
Sent from my HUAWEI U8815 using Tapatalk 2
Click to expand...
Click to collapse
I have gb, but the problem is when i re-insert the battery and power on the phone with vol down key pressed, it keeps rebooting, doesn't stay at the logo

biscuitpt said:
I have gb, but the problem is when i re-insert the battery and power on the phone with vol down key pressed, it keeps rebooting, doesn't stay at the logo
Click to expand...
Click to collapse
This is for ics mate.not gb.
Go to modaco
Ways to fix. Flash ota update b927 ...
Sent from my HUAWEI U8815 using Tapatalk 2

bootloop :/
Hi i tried this method and i dont know how it happened but now my phone is in a boot loop and i have no custom recovery, i cannot access anything just constant boot loop, big trouble,
does anyone have any idea?
thanks

evotaz said:
Hi i tried this method and i dont know how it happened but now my phone is in a boot loop and i have no custom recovery, i cannot access anything just constant boot loop, big trouble,
does anyone have any idea?
thanks
Click to expand...
Click to collapse
Turn ur phone completely off. By pulling out battery then apply the battery again.
Now hold volume down and power button and it should be in boot loader mode. If ur logo is stuck well this is in boot loader if not and it continues well.. idk
Sent from my Ascend G300 using Tapatalk 2

Hello krishneelg3,
I have tried a method on http://huaweig300.com but I'm stuck with the problem.
Installing USB drivers/Root/Backup IMEI went OK. Then by mistake I skipped the Step on page 5. Check Baseband and kept continued by Bootloader & ClockworkMod all went OK until the step 10. On page 6. After executing BootloaderG300.exe the phone rebooting cyclically, My operator screen appear for a approximately one second and the phone restarts again. How to resolve the problem and is there any hope to return to official ROM?
Thanks in advance, I really appreciate it.

petar17 said:
Hello krishneelg3,
I have tried a method on http://huaweig300.com but I'm stuck with the problem.
Installing USB drivers/Root/Backup IMEI went OK. Then by mistake I skipped the Step on page 5. Check Baseband and kept continued by Bootloader & ClockworkMod all went OK until the step 10. On page 6. After executing BootloaderG300.exe the phone rebooting cyclically, My operator screen appear for a approximately one second and the phone restarts again. How to resolve the problem and is there any hope to return to official ROM?
Thanks in advance, I really appreciate it.
Click to expand...
Click to collapse
What was ur baseband and were u running gingerbread?
If u r on official ics then this guide is for u, if not notify me.
PS : If you are running Gb I refer you to look into this guide, as long as your phone can boot into bootloader your fine, and I'm sure it will boot into Bloader mode : http://www.modaco.com/topic/353386-how-to-root-your-huawei-ascend-g300-for-windows-mac-and-linux/

Thanks krishneelg3,
my baseband is 109808, and I'm running GB.
The problem is that I don't know if I'm in a Bootloader mode when I see a pink screen?
When I press VOLUME DOWN + POWER it starts same as when I press POWER, first logoo (in my case picture of my operator) it lasts for about few seconds, then phone reboots and start doing it cyclically.
The other thing is that, when I press VOLUME DOWN + VOLUME UP + POWER, it then turns into a pink screen.
In that state (pink screen), when I plug in my phone to my PC, PC recognize my phone without reading sd card or internall memory.
So what should I do?
Thanks man, really appreciate it!

Guys,
I solved the problem.
I've just followed the instructions in step 5. on the site http://huaweig300.com and put a new update.app (1 KB) and copy it to the dload. After that I've used main dload (ICS folder, aprox abot 600 MB) and everything updated and installed successfully.
Thanks.
p.s. if anyone has or had the same problem, do not hesitate to ask.

hi all
sorry to hijack the thread
I have just got my son an ascend 300 which is locked to vodafone
its on android 2.3.6
the build number is
u881v100r001c02b892
i have a download of HDU88151079V100R001C00B934 which is the ICS but i dont think that will work for my build
ideally i want ICS but dont mind too much waiting.
but i do want to be able to get of all the bloatware.
I guess i need to root to do this.
the link to the modaco site is down and it seems this is for those lucky enough to be on ICS
would i be better off upgrading to ICS then following the method above or would i be better finding a method to root under gb (If so where)
many thanks

stringman said:
hi all
sorry to hijack the thread
I have just got my son an ascend 300 which is locked to vodafone
its on android 2.3.6
the build number is
u881v100r001c02b892
i have a download of HDU88151079V100R001C00B934 which is the ICS but i dont think that will work for my build
ideally i want ICS but dont mind too much waiting.
but i do want to be able to get of all the bloatware.
I guess i need to root to do this.
the link to the modaco site is down and it seems this is for those lucky enough to be on ICS
would i be better off upgrading to ICS then following the method above or would i be better finding a method to root under gb (If so where)
many thanks
Click to expand...
Click to collapse
OK get the official pics update b927* must be that build.
After its done downloading, extract its contents to your memorycard of the phone.
Make sure the update.app is in the root of SD card .
Then power off phone, remove battery re apply battery and hold the three buttons "volume up, volume down and the power button" until a screen pops up it will then install the stock ics once its done it'll reboot twice.
If only one it doesnt matter.
Setup the phone. Now to install b934 or newer versions use cwm for dazzozos repacks or the update force method. But I advice u to look for help on modaco. Thanks.
Modaco name : krishang3

krishneelg3
Thanks for that by b927* you are referring to a different version of HDU88151079V100R001C00B934 ?
where would i be able to get this from?
so this would give me the stock ics
what is the advantage of then installing HDU88151079V100R001C00B934 ?
Thanks

stringman said:
krishneelg3
Thanks for that by b927* you are referring to a different version of HDU88151079V100R001C00B934 ?
where would i be able to get this from?
so this would give me the stock ics
what is the advantage of then installing HDU88151079V100R001C00B934 ?
Thanks
Click to expand...
Click to collapse
Your on gingerbread so your baseband Is 109808 and if u flash any b934+ stock using the combinations say goodbye to your phone. I did that to my brothers and it bricked.
So to get to ice you must install b927 version of ics then your baseband will change to the new one *2030* now you can flash any b934+ stocks because you now have the new baseband.
Go to modaco and enter the G300 forums and look at the first dew pages all the info and guides you need. Procedure is simple.

Stuck on Samsung screen

I saw a couple people had the same issue that im now having but none of there solutions solved my problem
i wiped my GS3 for ATT tried to go back to a stock with root rom and when it rebooted it now just hangs at the samsung logo at boot tried re-flashing via odin with no luck also tried flashing a CWM.tar since i cant get into stock or CWM recovery to flash from there is there something im missing i know its late and maybe my brain isnt working like it should

Solved the problem myself.....and rather then just say i figured it out ill share how i did this since i watched countless videos and read endless amounts of threads and since none of them helped mem
First also try t put your phone into stock recovery mode and wipe your phone then flash this should take care of things if it doesnt try what i tried below
and i hope this can help someone else out there who has the same problem that i had all you have to do is the following i did this with obviously an AT&T model should work with others but as always try at your own risk.....
First make sure your battery has a charge even if its stuck on the boot screen its still charging....
then download KIES from samsung update it and make sure you have the latest version.
Next plug in your phone if your stuck at the samsung screen your computer will recognize your phone still at least it did with mine.
Once your done with the above open up KIES goto the top and then TOOLS and Firmware upgrade click on that enter your phone model (ATT SGH-I747) i dont get this part but next it will ask you for your SN and for some reason it doesnt recognize the SN use your IMEI
Now it should ask you a couple questions tell you its wiping your device and you will lose everything etc.....but then it will download the latest FW and begin to install everything and in about 20-25 mins everything will be back to stock

Nvm.. misread.

I'm stuck too...and Kies can't find the phone. Anyone have any other ideas? I can't even get into recovery...only download mode.

dbdynsty25 said:
I'm stuck too...and Kies can't find the phone. Anyone have any other ideas? I can't even get into recovery...only download mode.
Click to expand...
Click to collapse
your computer is not seeing your phone when you plug it in or its just KIES that doesnt see it??
also im guessing you have all the correct drivers installed??

yearziro said:
your computer is not seeing your phone when you plug it in or its just KIES that doesnt see it??
also im guessing you have all the correct drivers installed??
Click to expand...
Click to collapse
Yes, all drivers are installed because that's how I ODIN flashed it in the first place! Just stuck on the damn Samsung screen and I can't get Kies to connect to the phone. Not in Download Mode or when it's just stuck on that screen.

you can just hold VOL UP, HOME , POWER same time enter stock samsung recovery mode and scroll down select wipe data and cache and reboot u should good to go....

whit3gh0szt said:
you can just hold VOL UP, HOME , POWER same time enter stock samsung recovery mode and scroll down select wipe data and cache and reboot u should good to go....
Click to expand...
Click to collapse
Worked, thanks! I appreciate it.

it doesnt work on mine
dbdynsty25 said:
Worked, thanks! I appreciate it.
Click to expand...
Click to collapse
my cellphone reboots by itself on the samsun screen and i cant get on the recovery mode! any ideas!"

me neither
mkstf said:
my cellphone reboots by itself on the samsun screen and i cant get on the recovery mode! any ideas!"
Click to expand...
Click to collapse
Yeah I can't get into recovery either, and its getting really annoying.

indieslap said:
Yeah I can't get into recovery either, and its getting really annoying.
Click to expand...
Click to collapse
With the phone off, hold down VOL UP + HOME + POWER until the phone vibrates. Then let go of the power button. When you see the blue text in the top left corner of the samsung boot screen, let go of the other 2 buttons

xBeerdroiDx said:
With the phone off, hold down VOL UP + HOME + POWER until the phone vibrates. Then let go of the power button. When you see the blue text in the top left corner of the samsung boot screen, let go of the other 2 buttons
Click to expand...
Click to collapse
Okay, this brought the menu up for me, but I removed the data,cache, and reset the phone and it is still not working. Also, my phone just goes black after the Galaxy Samsung S3 logo, but the blue light in the top left is still on. Can anyone help me out?
P.S. Sorry for reviving this thread if it is too old.
Edit: I should also mention that I can still hear the sound of the phone booting up (the sound that typically occurs when the phone is on the white loading screen). However, the screen is black at this point.

cabato said:
Okay, this brought the menu up for me, but I removed the data,cache, and reset the phone and it is still not working. Also, my phone just goes black after the Galaxy Samsung S3 logo, but the blue light in the top left is still on. Can anyone help me out?
P.S. Sorry for reviving this thread if it is too old.
Edit: I should also mention that I can still hear the sound of the phone booting up (the sound that typically occurs when the phone is on the white loading screen). However, the screen is black at this point.
Click to expand...
Click to collapse
You're going to have to tell us what you did (changed, flashed, etc) before all this so that we can help you

xBeerdroiDx said:
You're going to have to tell us what you did (changed, flashed, etc) before all this so that we can help you
Click to expand...
Click to collapse
Ah, sorry about not providing enough information. Please keep in mind that I am very inexperienced and I may get some things incorrect just due to that. To my understanding, I went to try and root my phone, but beforehand I used the guides below to get my phone ready for the root (yes I do realize at this point that using these outdated guides was a clear mistake and I should have come to XDA instead). I flashed my phone to the stock kernel using the file that site provided, and then encountered the problem above. In my panic I have tried to restore the phone through several methods, but every time I try to load anything onto it with Odin, it doesn't complete until my phone restarts (and my phone won't boot up completely) so I can't get the pass message. Interestingly enough I did manage to get clockwork mod installed as that is what shows up when I try a secure boot using the methods that you described.
Ah, I am unfortunately not allowed to post links. The guides were off of Android Authority.
If there is any other information needed to help me please let me know and I will do my best to obtain it.

cabato said:
Ah, sorry about not providing enough information. Please keep in mind that I am very inexperienced and I may get some things incorrect just due to that. To my understanding, I went to try and root my phone, but beforehand I used the guides below to get my phone ready for the root (yes I do realize at this point that using these outdated guides was a clear mistake and I should have come to XDA instead). I flashed my phone to the stock kernel using the file that site provided, and then encountered the problem above. In my panic I have tried to restore the phone through several methods, but every time I try to load anything onto it with Odin, it doesn't complete until my phone restarts (and my phone won't boot up completely) so I can't get the pass message. Interestingly enough I did manage to get clockwork mod installed as that is what shows up when I try a secure boot using the methods that you described.
Ah, I am unfortunately not allowed to post links. The guides were off of Android Authority.
If there is any other information needed to help me please let me know and I will do my best to obtain it.
Click to expand...
Click to collapse
Sounds like you need to clear your cache partition and clear your dalvik cache. There are several guides on this site to help you. Choose the one that is most appropriate to what you are trying to do and follow it EXACTLY. There is one to start. Follow it from the beginning.
http://forum.xda-developers.com/showthread.php?t=2042775

When nothing else works start over from search. You cab use download mode? First make sure you got right drivers as that can mess up Odin. Use one in my Sig if you want. Then flag stock recovery with root someone nice will part a link to it I'm on my phone can't do it. Well fix your phone
Sent from my SGH-I747 using xda premium

allow rldcess
Okay now I am running into another problem. I have tried downloading the drivers from many different places and they always seem to be correctly downloaded. That being said, I can't install the drivers after I plug my phone into the computer (after downloading and installing Samsung USB drivers). Therefore, I cannot access my phone storage to put the root zip file on it. I was still able to download the custom recovery.
Now I have gone to a different computer, and the drivers seem to install correctly, but the phone still does not appear under my computer.
Edit: I do already have a root zip file on my phone from my earlier attempt, but I install it and my phone still doesn't load up. Also, Odin still recognizes the phone.
Edit 2: Windows says that the drivers cannot recognize the device. Edit 3: "Hardware ID Missing"

Bump
Sorry, I really need help for this. I can't install the MTP drivers even through using some of the tips on this site. That seems to be the problem with me accessing the phones storage from my computer. Does anyone have an ideas for what else I could do? Should I just take it to the store and hope they can fix it?

cabato said:
Okay now I am running into another problem. I have tried downloading the drivers from many different places and they always seem to be correctly downloaded. That being said, I can't install the drivers after I plug my phone into the computer (after downloading and installing Samsung USB drivers). Therefore, I cannot access my phone storage to put the root zip file on it. I was still able to download the custom recovery.
Now I have gone to a different computer, and the drivers seem to install correctly, but the phone still does not appear under my computer.
Edit: I do already have a root zip file on my phone from my earlier attempt, but I install it and my phone still doesn't load up. Also, Odin still recognizes the phone.
Edit 2: Windows says that the drivers cannot recognize the device. Edit 3: "Hardware ID Missing"
Click to expand...
Click to collapse
go to your device manager on your computer, locate samsung drivers for your device, uninstall them
restart your computer
then plug in the phone and lets it reinstall by itself

Use my drivers in my signature
They are last good damaging drivers. Don't update them but install them and plug phone in with no internet. after install plug internet in. There good stable drivers
Sent from my SAMSUNG-SGH-I747 using xda premium

[Q] [HELP] P350 stuck on LG logo 4 softkeys blinking

Hi, I've just registered in this forum, though I've been reading you guys for almost a year. I just want to say that you guys are awesome, i've learned too much about android because of you.
Introduction
Said that, I recently had a problem with my P350g, I'll try to be as clear as possible hoping you can help me out.
The problem came after i installed CM 9 [stable 8] on it, at first it worked perfectly (a very few panics or reboots but i'm used to it :laugh. The next day after taking a photograph the cellphone got stuck, it had done that several times before with some other ROMs so i didn't pay much attention to it, so i took the battery off and put it again, and when I tried to turn it on, there it was, the lg logo with the 4 softkeys blinking.
-- It doesn't enter to recovery (i had recovery installed at that time) pressing [- power send] at the same time, it just stays there with the lg logo blinking.
-- It does enter to the emergency mode (yellow background with "emergency mode" in black letters) pressing [+ - power] at the same time.
-- It does enter to the fastboot mode pressing [+ power send] at the same time.
what i've already tryed:
--- i've read the wiki about this phone and try everything there (and everything found on google which is pretty much the same)
http://forum.xda-developers.com/wiki/LG_Optimus_Me
--- i've tryed using the KDZ updater as somebody on this forum recommended:
http://multidroid2.feed.nu/2012/03/27/how-to-unbrickflash-your-optimus-melg-p350-2/
using firmware from here:
http://lg-phone-firmware.com/index.php?id_mod=5
and from somewhere else on the internet, the problem here is, that when it comes to "restart the phone", it doesn't start, it just keeps getting stuck on the lg logo with the 4 softkeys blinking, after some time the KDZ updater shows an error: Upgrade Error WParam: 100 LParam: 6
--- i've tryed flashing the recovery from fastboot mode as shown on this thread:
http://forum.xda-developers.com/showthread.php?t=2131247
it flashes well, everything "succeeded" but whe it comes to reboot (flashboot reboot) the cellphone says on the screen rebooting cellphone (or something like that) but it never reboots. if I take the battery off and put it on again, and then try to turn it on, the cellphone shows at the same problem, the lg logo with 4 softkeys blinking.
--- I've also tryed this tool:
http://forum.xda-developers.com/showthread.php?t=1948326
it hasn't solved my problem either.
Computers' info
I've tried this on 2 computers:
windows 7 x86
windows 8 x64
both of them have the drivers installed, I've disabled the modem on both of them, both of them have the latest android SDK tools
both computers give me the same problems, please i need your help, i'm desperate, I've been with this problem for several days and I can't solve it. I hope you can help me out

bump!
Anybody? please, i'm desperate

Hi,
Let's hope for the good
Try to flash the rom with fastboot.
and did you overclocked it too high? maybe your nand is burned?

kD said:
Hi,
Let's hope for the good
Try to flash the rom with fastboot.
and did you overclocked it too high? maybe your nand is burned?
Click to expand...
Click to collapse
thanks for answering, yes i did overclock it really high ~804MHz can't remember the exact number, but with other roms it had been working at that level of overclock without any problems (besides the casual panics and reboots) for more than half a year.
i'm going to try flashing the rom from flashboot and see what happens

I couldn't fash a rom via fastboot
IsraelMP said:
thanks for answering, yes i did overclock it really high ~804MHz can't remember the exact number, but with other roms it had been working at that level of overclock without any problems (besides the casual panics and reboots) for more than half a year.
i'm going to try flashing the rom from flashboot and see what happens
Click to expand...
Click to collapse
Hi everybody, i tried to flash a zip containing the rom on my p350, though i could not flash it. i used the command:
fastboot flash system rom.zip
but it says the file/rom size was smaller than expected. (honestly i can't remember the actual sentence) and then it says (x < y) where x is the suposed size of the rom and y is the expected size.
i tried with several roms, and a backup a user uploaded somewhere which was suposedly legitimate.
Is there something i can do?

download lg mobile support tool (lg mobile updater)
make sure that the driver is installed on the computer
open it
let it reconize the phone then
click recover phone from CS
the phone will be returned to latest stock rom for your country
then intsall recvoery again and root again

My Method
Well you need usb debugging enabled.Remove phone's batytery and connect it to pc via usb.It will boot up (horribly of course ignore it).Then fire up the kdz updater and start the flashing process.Once the phocess starts midway anywhere in the process insert the battery.The process will complete then KDZ will sat update complete...REBOOTING....and as battery is inserted it will reboot.Voila.Hope it works for you.This is my routine method.(Bricked more than 7 times lol).

Thanks for replying
MeeDa said:
download lg mobile support tool (lg mobile updater)
make sure that the driver is installed on the computer
open it
let it reconize the phone then
click recover phone from CS
the phone will be returned to latest stock rom for your country
then intsall recvoery again and root again
Click to expand...
Click to collapse
thanks for replying, i did that, when i just plug it without pressing any button the cellphone does not get recognized by the software, when i plug it in emergency mode it does get recognized but the software gives me an error.
blazecodester said:
Well you need usb debugging enabled.Remove phone's batytery and connect it to pc via usb.It will boot up (horribly of course ignore it).Then fire up the kdz updater and start the flashing process.Once the phocess starts midway anywhere in the process insert the battery.The process will complete then KDZ will sat update complete...REBOOTING....and as battery is inserted it will reboot.Voila.Hope it works for you.This is my routine method.(Bricked more than 7 times lol).
Click to expand...
Click to collapse
thanks for the answer, I tried that way, though it keeps getting stuck in the LG logo with the 4 blinking softkeys when it comes to reboot the cellphone.

Nasty Bootloop after Flash on Sprint G2

Last night I installed geefree on my phone from the app store and used it to install TWRP. I downloaded a nightly CM11 and an appropriate gapps. Using geefree I rebooted to recovery (never figured out the button combination to boot to recovery "naturally") and installed both of the zips. This could be where I made my mistake, I installed both at the same time.
Now my phone loops, displaying the LG logo for a few seconds, then shutting off and rebooting before repeating the process. I can't seem to get it to go into download mode or the recovery menu. I've tried power+up, power+down, down+up and each of those while plugging the device in, etc. I can get the device to a hardware key control mode, though it doesn't seem too useful.
How can I save my phone? This forum has been a great resource in the past and I'm very grateful for the many tutorials I've followed rooting other devices. Hopefully you guys can save the day once again!

Volume up plus power is how to access recovery on sprint.
What stock sw version were you on before you flashed cm?
Did you wipe data before flashing?
Sent from my LG-LS970 using xda app-developers app

I was using stock 4.2.2, I believe. I didn't wipe the data (shame on me), a bad habit that I picked up from my first rooted device, the Samsung Moment. It didn't ever matter on that one, afaik. Thanks for the reply!
Edit: Volume up and power whether plugged in or not takes me to the hardware key control mode screen.
Second Edit: http://forum.xda-developers.com/showthread.php?t=2432476&page=35 I also found this thread where someone seems to be experiencing similar issues and they fix it with "LG Utility." Is that a PC application? It's a little vague to google, but I've been trying!

I have a bootloop issue every time i flash a rom i have to wipe all but sd flash roms and gapps the i do a restore from twrp and oly restore my boot image only and they boot no prob

I'm kind of starting to suspect my power button doesn't work at all for whatever reason. I have a lot of difficulty getting the phone to shut down, then it doesn't seem to easily power up. It's a strange collection of problems. Would a Sprint repair place be able to fix this?

If they have parts on hand if not either a swap out or a sendoff

Same problem here - bootloop and no download mode - CWM works! - urgently need help
I guess I have the same problem as InlineFourPower (apart from that my power-button has no problem).
I am stuck in bootloop since I tried to upgrade to Kitkat a few days ago. Now I can´t get into download mode any more, nor into fastboot or anything else. Only CWM works.
From within CWM I can successfully flash ROMs but that doesn´t help, since afterwards I am still stuck in bootloop. It is possible, however, to push files via adb-commands while I am in CWM.
Does anybody have an idea how to go from here or how to get download-mode back?

Device is recognized but can´t be mounted - bricked forever?
Parinibbana said:
I guess I have the same problem as InlineFourPower (apart from that my power-button has no problem).
I am stuck in bootloop since I tried to upgrade to Kitkat a few days ago. Now I can´t get into download mode any more, nor into fastboot or anything else. Only CWM works.
From within CWM I can successfully flash ROMs but that doesn´t help, since afterwards I am still stuck in bootloop. It is possible, however, to push files via adb-commands while I am in CWM.
Does anybody have an idea how to go from here or how to get download-mode back?
Click to expand...
Click to collapse
I tried a few things on Linux.
After terminal-command "ls /dev/sd*" when the device is unplugged from the computer I get "/dev/sda".
When the device is connected via USB, I get: "/dev/sda /dev/sdb"
So sdb is my LG G2.
So I went on to the next command: "gdisk -l /dev/sdb"
As a result I get: "Problem opening /dev/sdb for reading! Error is 123."
Does it mean that the phone isn´t mounted or what? Now I´ve connected my phone to another Linux machine with the same result. It is recognised (p.e. as sdd), but there is no sdd1. Seems as if it is recognized, but can´t be mounted. Does that mean my device is bricked for good? That´s it?

to get the phone into download mode you have to plug the usb cord in and hold VOL+, so to get this right as I have a case on mine, plug the usb into the phone first then hold VOL+ and plug into usb port on the computer.
it does take a loooong time to power down the phone with the button when stuck in a boot loop, just keep holding it until it shuts off, it will shut off eventually!!
plug the phone in while in download mode to install drivers and set com ports, then unplug before you begin your flash with LGFlashTool, hope this helps you out.

Cronic2009 said:
to get the phone into download mode you have to plug the usb cord in and hold VOL+, so to get this right as I have a case on mine, plug the usb in first then hold VOL+ and plug into usb port.
it does take a loooong time to power down the phone with the button when stuck in a boot loop, just keep holding it until it shuts off, hope this helps
Click to expand...
Click to collapse
Thanks Cronic2009 for your advice.
There are, however, szenarios where download-mode is not accessible any more. Neither by using the hardware-keys, nor by using the adb-command.
After four days of resarch and a lot of trial and error, I finally unbricked my F320L using the two adb-commands outlined at the beginning of that thread: http://forum.xda-developers.com/showthread.php?t=2451696
Worked like a charm.
Thanks everyone for your advice.

no problem buddy, glad you got it figured out, good luck to you from here on out!
FYI, that link doesn't work
I just wanted to ask anyone who might know, since the bootloader of the LS980 is locked, we cannot "break" this correct, so no matter what commands we decide to run through root, we cant touch the true bootloader there for LS980 fail safe? (Besides Acts of God, EMP, ect)

Cronic2009 said:
no problem buddy, glad you got it figured out, good luck to you from here on out!
Click to expand...
Click to collapse
Thanks for letting me know. I corrected the link in my previous post.

Be sure if you use a aosp based rom to flash the ZV8 modem. Your can use dr87 or furnance kernals after you flash the zva modem althought i have encountered soft brick due to this.

so i'm having this exact issue and i don't know how to get out of it. i just need to transfer the radio to my phone somehow but nothing shows up under adb devices. i'm trying to the lg mobile support tool now. its downloading the software. but if it doesn't work does any one have any fixes?
edit: i fixed it by following this http://forum.xda-developers.com/showthread.php?p=51637410&highlight=download+fail#post51637410

pitbullmommy45245 said:
so i'm having this exact issue and i don't know how to get out of it. i just need to transfer the radio to my phone somehow but nothing shows up under adb devices. i'm trying to the lg mobile support tool now. its downloading the software. but if it doesn't work does any one have any fixes?
edit: i fixed it by following this http://forum.xda-developers.com/showthread.php?p=51637410&highlight=download+fail#post51637410
Click to expand...
Click to collapse
Thank You for sharing you fixed your issue pittbullmommy but the link you posted points back to a post about a failed run on LGFlashTool, will you please fix the link and point it to the post/guide you used to fix your phone, it may help others stuck in a similar situation, glad to hear you got it fixed and working, best of luck with it from here on out!

Hi all
was just about to start a new thread but didn't want to get into trouble..anyway I am in need of some assistance please.my ls980 has been bricked for some time now been searching all over the internet for a solution to be stuck back at square one.found this video on youtube which is pretty much exactly what my phone is doing.I have used lg flash tool to revert to stock and still nothing I lost root doing that but last night,I managed to regain root access I have no idea how but it happened when i clicked ioroot batch file i went into download mode and it stated bottom left ROOTED in red so i managed that but that is it still doing what is being shown in the video its on youtube
watch?v=PjLF-pBhZSY
please if anyone has the know how I would like to fix this phone rather then bin it thank you all happy 4th everyone

After using tot and flash tool to get back to stock, did you try going into stock recovery and do a factory data reset? I know it sounds stupid especially after a tot but try it. Couldn't hurt
Sent from my LG-LS980 using Tapatalk

Borderline noob here, so please bear with me...
I have been using TWRP 2.7.0.0 to do all my work, and I was able to get the Lego ROM installed with ZVA. I got into too big of a hurry and forgot to make a backup of stock. I've also been unsuccessful in trying to install ZVC modem and firmware. Thankfully ZVA works as does the LEGO ROM, but I'd like to have stock there to access as well. The stockZVC that's on the Android Development page has been getting stuck (bootloop?) on the Sprint Spark logo. I've done TWRP's factory reset with no success. Any help would be great.
Thanks in advance!

Yes sir I've tried that and more to no avail is there anything I can do through adb I'm on stock recovery phone doesn't stay on long enough to install anything

sarfdawg said:
Borderline noob here, so please bear with me...
I have been using TWRP 2.7.0.0 to do all my work, and I was able to get the Lego ROM installed with ZVA. I got into too big of a hurry and forgot to make a backup of stock. I've also been unsuccessful in trying to install ZVC modem and firmware. Thankfully ZVA works as does the LEGO ROM, but I'd like to have stock there to access as well. The stockZVC that's on the Android Development page has been getting stuck (bootloop?) on the Sprint Spark logo. I've done TWRP's factory reset with no success. Any help would be great.
Thanks in advance!
Click to expand...
Click to collapse
You ever get her fixed?

Galaxy S20 Ultra stuck in Recovery Mode after failed Smwart Switch Update

Hi guys,
I attached my brand new Galaxy S20 Ultra to my PC and started Smart Switch today. The Software showed an update for my device so I downloaded it and started the update process. Unfortunately, Smart Switch got stuck during the update process at 68%. Nothing happened, cables and all still attached. It just didn't proceed any further for hours.
I decided to take the path of stopping the process, using the key combination shown on my device. It now said, recover your device software with Smart Switch Emergency recovery function. I started this and guess what: it also stopped at 68%.
I "rebooted" the device (volume down + power for approx. 10 seconds) and it starts again in recovery mode.
I manually filled in the recovery code and it seemed like Smart Switch was downloading the OS again. Started the recovery process and it is stuck at 68% again.
Now I am just super afraid that I bricked the device by using Samsungs original software.
Anyone her to help or have similar experiences?
Thanks for any advice on how to proceed.
Julius

What exactly were you trying to do? I mean normally you hook up old phone and use smart switch to update new phone. So why was you connected to a PC? It does sound like you bricked it.
So now you probably need to flash the ROM.

I read that smart switch is a good and valid source to check for updates. I never thought that an official Samsung software can be so bad at something so basic, resulting in bricking my phone...

Stop using smart switch to update your phone. You haven't hard bricked it because you still have recovery. It's called a soft brick. Download Odin 13.3_3B from here on xda. Do not use the 13.4 because it's suspected to have a fishy call back to a server from a dll that's in the program folder. Download the atch firmware for your model from sammobile or get it in this s20 ultra forum. You should be able to flash the new firmware.

Thanks @freebee269. Does flashing the firmware with Odin void my warranty or does this only count for rooting devices? (Sorry for stupid questions)

Julius_GER said:
Thanks @freebee269. Does flashing the firmware with Odin void my warranty or does this only count for rooting devices? (Sorry for stupid questions)
Click to expand...
Click to collapse
Odin uses official firmware from Samsung so no warranty voided.

Julius_GER said:
Hi guys,
I attached my brand new Galaxy S20 Ultra to my PC and started Smart Switch today. The Software showed an update for my device so I downloaded it and started the update process. Unfortunately, Smart Switch got stuck during the update process at 68%. Nothing happened, cables and all still attached. It just didn't proceed any further for hours.
I decided to take the path of stopping the process, using the key combination shown on my device. It now said, recover your device software with Smart Switch Emergency recovery function. I started this and guess what: it also stopped at 68%.
I "rebooted" the device (volume down + power for approx. 10 seconds) and it starts again in recovery mode.
I manually filled in the recovery code and it seemed like Smart Switch was downloading the OS again. Started the recovery process and it is stuck at 68% again.
Now I am just super afraid that I bricked the device by using Samsungs original software.
Anyone her to help or have similar experiences?
Thanks for any advice on how to proceed.
Julius
Click to expand...
Click to collapse
What kind of USB Port did you use?
Try again using a USB 2.0 port, Samsung always had problems with it's software and USB 3.0 ports.
Use USB 2.0 and try again.

Hi guys, i have a similar problem as (xReem).
Attached my GT SM-T515/10.1 tab to smart switch where the software was unable to recognise my device!? Was advised to use the Emergency Code function but i have no code due to backing up my data to sd card! I have Magisk and TWRP installed where my device was working beforehand, but since attaching to smart switch, my device is now totally "dysfunctional"!!!
Error message as follows...
...An error as occurred while updating the software. Use the Emergency Recovery function in the Smart Switch PC software. ...
Like i sad, i have no code!!!
I am able to get to the device unlock choice screen and if i choose to restart, my device always boots to the Smart Switch Emergency Code screen?! If i choose the device unlock or download screens, both screens are accessible! Tried to flash my original firmware (BTU-T515XXU3ASK5-20191224095700) using Odin3_v3.14.1 and twrp-3.3.1-6-T515XXU3ASK5-20200215 with no joy (Fail!)
Although i'm totally @"#$%* off about this, as its a new device, i am also curious if someone has ever cracked this... 'Smart Switch No Code' problem before. Hmm...
Anyways, any help appriciated...
Oh! Cannot access recovery at all...
Any help appriciated.

klantee said:
Hi guys, i have a similar problem as (xReem).
Attached my GT SM-T515/10.1 tab to smart switch where the software was unable to recognise my device!? Was advised to use the Emergency Code function but i have no code due to backing up my data to sd card! I have Magisk and TWRP installed where my device was working beforehand, but since attaching to smart switch, my device is now totally "dysfunctional"!!!
Error message as follows...
...An error as occurred while updating the software. Use the Emergency Recovery function in the Smart Switch PC software. ...
Like i sad, i have no code!!!
I am able to get to the device unlock choice screen and if i choose to restart, my device always boots to the Smart Switch Emergency Code screen?! If i choose the device unlock or download screens, both screens are accessible! Tried to flash my original firmware (BTU-T515XXU3ASK5-20191224095700) using Odin3_v3.14.1 and twrp-3.3.1-6-T515XXU3ASK5-20200215 with no joy (Fail!)
Although i'm totally @"#$%* off about this, as its a new device, i am also curious if someone has ever cracked this... 'Smart Switch No Code' problem before. Hmm...
Anyways, any help appriciated...
Oh! Cannot access recovery at all...
Any help appriciated.
Click to expand...
Click to collapse
Did you ever get things working ? If not, when you flashed with Odin - did you use the PATCHED Version ? THis is necessary when flashing firmware via Odin on the S20 Ultra.....
You can download Odin 3.14.1_3b here: https://forum.xda-developers.com/android/software/patched-odin-3-13-1-t3762572
Be sure to download the PATCHED version of 3.14.1_3b (it is located as an attached file at the bottom of the first post in the OP at the link above. Hope this helps.

Geekser said:
Did you ever get things working ? If not, when you flashed with Odin - did you use the PATCHED Version ? THis is necessary when flashing firmware via Odin on the S20 Ultra.....
You can download Odin 3.14.1_3b here: https://forum.xda-developers.com/android/software/patched-odin-3-13-1-t3762572
Be sure to download the PATCHED version of 3.14.1_3b (it is located as an attached file at the bottom of the first post in the OP at the link above. Hope this helps.
Click to expand...
Click to collapse
No, to answer your first question, and yes used the patched version of Odin you state but with no joy.
(would another version of Odin be better for my device model?)
I just need to find a way to flash the original stock recovery. Having the TWRP installed as mentioned earlier is blocking my path, and I have now tripped knox! So no more options available to access the unlock oem screen. Now frp is off, oem is on!
Also, I was wondering if anyone had thought about a totally updated version of the old "ALL IN ONE TOOL" which was available for some earlier makes of phone devices? I think due to manufacturers security upgrades of today's phones we could all do with something like this?
I heard you can do a NAND/Reset wipe via the Odin options screen which would allow you to install a new rom???
Oh, my predicament was based on Julius's post, not xReem. Sorry for the confusion.

klantee said:
No, to answer your first question, and yes used the patched version of Odin you state but with no joy.
(would another version of Odin be better for my device model?)
I just need to find a way to flash the original stock recovery. Having the TWRP installed as mentioned earlier is blocking my path, and I have now tripped knox! So no more options available to access the unlock oem screen. Now frp is off, oem is on!
Also, I was wondering if anyone had thought about a totally updated version of the old "ALL IN ONE TOOL" which was available for some earlier makes of phone devices? I think due to manufacturers security upgrades of today's phones we could all do with something like this?
I heard you can do a NAND/Reset wipe via the Odin options screen which would allow you to install a new rom???
Oh, my predicament was based on Julius's post, not xReem. Sorry for the confusion.
Click to expand...
Click to collapse
Sorry for your troubles - wish I could help you but you have done everything I would have tried. Maybe, if you haven't already done this - leave the phone on until the battery runs out completely. Then, recharge the phone for a while so the battery has some juice again and then get the phone back into download mode by pressing volume up and volume down at the same time - then plug in the USB - it shoul.d launch into download mode again - then try flashing again with the patched odin.
If you have already done this - then I don't know how what else to suggest.
I wish you luck and hope you are able to get things working again.

Geekser said:
Sorry for your troubles - wish I could help you but you have done everything I would have tried. Maybe, if you haven't already done this - leave the phone on until the battery runs out completely. Then, recharge the phone for a while so the battery has some juice again and then get the phone back into download mode by pressing volume up and volume down at the same time - then plug in the USB - it shoul.d launch into download mode again - then try flashing again with the patched odin.
If you have already done this - then I don't know how what else to suggest.
I wish you luck and hope you are able to get things working again.
Click to expand...
Click to collapse
Thanks for the advice. I'll try what you suggest and see what happens. Stay well!

Julius_GER said:
Hi guys,
I attached my brand new Galaxy S20 Ultra to my PC and started Smart Switch today. The Software showed an update for my device so I downloaded it and started the update process. Unfortunately, Smart Switch got stuck during the update process at 68%. Nothing happened, cables and all still attached. It just didn't proceed any further for hours.
I decided to take the path of stopping the process, using the key combination shown on my device. It now said, recover your device software with Smart Switch Emergency recovery function. I started this and guess what: it also stopped at 68%.
I "rebooted" the device (volume down + power for approx. 10 seconds) and it starts again in recovery mode.
I manually filled in the recovery code and it seemed like Smart Switch was downloading the OS again. Started the recovery process and it is stuck at 68% again.
Now I am just super afraid that I bricked the device by using Samsungs original software.
Anyone her to help or have similar experiences?
Thanks for any advice on how to proceed.
Julius
Click to expand...
Click to collapse
Hey Julius, did you get your phone to work. I am having the same issue.
Update:
I am good now. I was using the thunderbolt cable that came with the phone and update would get stuck at the same point everything with odin 3.13 and 3.14.
I used a USB 3 to thunderbolt cable that I had from an older phone and it work.
What I used:
Windows 10 x64 1909
USB 3 to thunderbolt cable
USB driver downloaded from Samsung support. I think it is the same driver that comes with smart switch because when I installed it, it prompted
to reinstall driver.
Odin3 v3.13.3_3B_PatcheD from here https://forum.xda-developers.com/android/software/patched-odin-3-13-1-t3762572. ( I think 3.14 will work too.
I really think the cable was the only problem)
Firmware downloaded with SamFirm

klantee said:
Thanks for the advice. I'll try what you suggest and see what happens. Stay well!
Click to expand...
Click to collapse
Open Odin as administrator and if using a stock AP file always use the HOME-CSC of the same firmware in CSC slot. Sometimes Odin plays the fool and gets stuck.

ASHLEY117 said:
Open Odin as administrator and if using a stock AP file always use the HOME-CSC of the same firmware in CSC slot. Sometimes Odin plays the fool and gets stuck.
Click to expand...
Click to collapse
Wow! This nearly worked!!!
Managed to get a (((PASS))) on Odin and my tab actually rebooted into the Samsung logo!!!
Soon after this though tab immediately Boots back into download mode??? Tried the same steps but without any progress???
I feel I'm close to cracking this but need some more advice on how to build on such "progress"!?
Many thanks for your advice...

klantee said:
Wow! This nearly worked!!!
Managed to get a (((PASS))) on Odin and my tab actually rebooted into the Samsung logo!!!
Soon after this though tab immediately Boots back into download mode??? Tried the same steps but without any progress???
I feel I'm close to cracking this but need some more advice on how to build on such "progress"!?
Many thanks for your advice...
Click to expand...
Click to collapse
Try with all slots filled but with CSC file not HOME-CSC. That may help as it flashes pit file to factory reset

ASHLEY117 said:
Try with all slots filled but with CSC file not HOME-CSC. That may help as it flashes pit file to factory reset
Click to expand...
Click to collapse
Tried your suggestion with no joy. Will keep trying though as I feel this issue can be cracked. Many thanks...

Geekser said:
Sorry for your troubles - wish I could help you but you have done everything I would have tried. Maybe, if you haven't already done this - leave the phone on until the battery runs out completely. Then, recharge the phone for a while so the battery has some juice again and then get the phone back into download mode by pressing volume up and volume down at the same time - then plug in the USB - it shoul.d launch into download mode again - then try flashing again with the patched odin.
If you have already done this - then I don't know how what else to suggest.
I wish you luck and hope you are able to get things working again.
Click to expand...
Click to collapse
(((SUCCESS)))!!! :laugh::laugh::laugh:
Done what you suggested by waiting until my battery ran out!
I downloaded a different software version and as soon as I plugged my tab into my PC with USB, i flashed the new software with no problems!!!
Flashed TWRP, Magisk and Multidisabler problemless the same!
The lesson learnt here...
...(ONLY FOR THOSE WHO KNOW WHAT THEY ARE DOING)...
...is to probably only have 30% battery when flashing!!! This way you won't have to wait weeks for such a large capacity battery to run down, like I did!
I knew I'd crack it!

klantee said:
(((SUCCESS)))!!! :laugh::laugh::laugh:
Done what you suggested by waiting until my battery ran out!
I downloaded a different software version and as soon as I plugged my tab into my PC with USB, i flashed the new software with no problems!!!
Flashed TWRP, Magisk and Multidisabler problemless the same!
The lesson learnt here...
...(ONLY FOR THOSE WHO KNOW WHAT THEY ARE DOING)...
...is to probably only have 30% battery when flashing!!! This way you won't have to wait weeks for such a large capacity battery to run down, like I did!
I knew I'd crack it!
Click to expand...
Click to collapse
Glad I could hel;p- I know how frustrating it is when things seem like you can never get things to work - anyway - best of luck - and be sure to hit thanks If I helped you.

Hi Do you lose your data (vids and pics) via this method? i have had same thing happen on my s20+