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[Q] After erasing the recovery with fastboot my LG p350 don't start

Hello,
I have followed a tutorial for solving the problem of "Fastboot mode started
udc_start()" from this thread http://forum.xda-developers.com/showthread.php?t=2131247 and something was go wrong.
I have done this steps in the sdk platform tools folder:
1- fastboot erase recovery
2- fastboot flash recovery recovery.img ( here i've got an error)
3- fastboot reboot
Everyting was ok until I have tried to write the .img file on the phone. I've got an error that I don't have enough space. I think I have deleted the recovery file and now it's stuck, because it's not booting. The 4 leds from the bottom it's flashing continuously and the screen remains to the LG logo. I have tried to connect the phone to the PC but the device it's not recognized anymore. I get this message in the adb tool "Waiting for device"
I really appreciate if it's someone that can help me

I have a p500 and I had the exact same problem as you. But I was able to fix it after a lot of Googling.
Can you get to fastboot right now? If so, make sure that the recovery you downloaded is correctly named "recovery.img" and is placed in the same folder as adb.exe is located. After that, type:
Code:
fastboot devices
into ADB. If your device is listed then proceed and type:
Code:
fastboot flash recovery recovery.img
If nothing comes up when you ask it to list fastboot devices you need to delete all of the drivers associated with your p350, and then reinstall them using a toolkit or PDAnet. Then go back and try fastboot devices again.
.

Logan_M said:
I have a p500 and I had the exact same problem as you. But I was able to fix it after a lot of Googling.
Can you get to fastboot right now? If so, make sure that the recovery you downloaded is correctly named "recovery.img" and is placed in the same folder as adb.exe is located. After that, type:
Code:
fastboot devices
into ADB. If your device is listed then proceed and type:
Code:
fastboot flash recovery recovery.img
If nothing comes up when you ask it to list fastboot devices you need to delete all of the drivers associated with your p350, and then reinstall them using a toolkit or PDAnet. Then go back and try fastboot devices again.
.
Click to expand...
Click to collapse
No, I can't get to fastboot. I can't do anything with the command line. It remains to the logo screen

catalin11 said:
No, I can't get to fastboot. I can't do anything with the command line. It remains to the logo screen
Click to expand...
Click to collapse
Can you pull the battery and then use the combination to get into Fastboot? If you can't get to fastboot, then the problem is beyond what I'm capable of doing.
Though, the problem may be that you completely deleted your recovery.

Logan_M said:
Can you pull the battery and then use the combination to get into Fastboot? If you can't get to fastboot, then the problem is beyond what I'm capable of doing.
Though, the problem may be that you completely deleted your recovery.
Click to expand...
Click to collapse
Now, I'm back to the first problem
"Fastboot mode started udc_start()
-- suspend --
-- suspend --
"

catalin11 said:
Now, I'm back to the first problem
"Fastboot mode started udc_start()
-- suspend --
-- suspend --
"
Click to expand...
Click to collapse
if i write this in cmd "fastboot flash recovery recovery.img" it apear < waiting for device > and nothing happens

catalin11 said:
if i write this in cmd "fastboot flash recovery recovery.img" it apear < waiting for device > and nothing happens
Click to expand...
Click to collapse
now i'm in the emergency mode

Problem solved:
1- download the official drivers from LG Site
2- cmd and:
fastboot erase boot
fastboot erase system
fastboot erase userdata
fastboot -w
fastboot flash recovery recovery.img (Clowork custom recovery)
Fastboot Reboot
Installing Cyanogen after i erase everything (fastboot erase sdcard). I like fresh starts

some1 pls help me
catalin11 said:
Problem solved:
1- download the official drivers from LG Site
2- cmd and:
fastboot erase boot
fastboot erase system
fastboot erase userdata
fastboot -w
fastboot flash recovery recovery.img (Clowork custom recovery)
Fastboot Reboot
Installing Cyanogen after i erase everything (fastboot erase sdcard). I like fresh starts
Click to expand...
Click to collapse
can u plz elaborate...i too have the same problem....plz..

Logan_M said:
If so, make sure that the recovery you downloaded is correctly named "recovery.img" and is placed in the same folder as adb.exe is located.
Click to expand...
Click to collapse
That is incorrect. The recovery does NOT have to be named recovery to use fastboot to flash it, although it does make life simpler

[Q] In dire need of help, stuck with no ROM on phone :(

Hello all,
as the title says, I'm stuck in TWRP recovery after wiping my rom to revert to stock... then realising that the recovery doesn't recognise the image as it's a .tgz file.
I've tried to ADB into it, but no such luck, I just get error: device not found.
Does anyone know a way I can fix this?
I've also tried the adb sideload feature of TWRP to no avail.
Thanks in advanced guys.

Flash the factory image through fastboot. Download and run flash-all.bat (something along those lines)
Sent from my Nexus 5 using Tapatalk

Go to bootloader and run "fastboot devices" and see whether your device gets detected or not? If it does, then flash the factory images. System and boot img files would do the job.
If it doesn't then you need to fix the adb, fastboot issues first. Follow these threads:
http://forum.xda-developers.com/goo...nosing-usb-driver-adb-issues-windows-t2514396
http://forum.xda-developers.com/goo...nt/adb-fb-apx-driver-universal-naked-t2513339
If you have an OTG cable with you, you can directly flash the rom from a usb stick!

tangosierra_ said:
Flash the factory image through fastboot. Download and run flash-all.bat (something along those lines)
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
'fastboot is not recognised as an internal or external command, operable program or batch file.'
Also, i'm trying this from the PC just to be clear, as I can't boot my phone lol.
soon as i run flash-all.bat i get the error i put on the first line

Dixi1801 said:
'fastboot is not recognised as an internal or external command, operable program or batch file.'
Also, i'm trying this from the PC just to be clear, as I can't boot my phone lol.
soon as i run flash-all.bat i get the error i put on the first line
Click to expand...
Click to collapse
You havent got fastboot installed.
Go to teh link in my signature.... Then go to section 1b, 1

usb/otg
Dixi1801 said:
Hello all,
as the title says, I'm stuck in TWRP recovery after wiping my rom to revert to stock... then realising that the recovery doesn't recognise the image as it's a .tgz file.
I've tried to ADB into it, but no such luck, I just get error: device not found.
Does anyone know a way I can fix this?
I've also tried the adb sideload feature of TWRP to no avail.
Thanks in advanced guys.[/QUOT
Download any compatible rom to a usb/otg..mount from TRWP and your good to go..Happens to me once..Just download any compatible roms just to bring up your phone..
Click to expand...
Click to collapse

Dixi1801 said:
'fastboot is not recognised as an internal or external command, operable program or batch file.'
Also, i'm trying this from the PC just to be clear, as I can't boot my phone lol.
soon as i run flash-all.bat i get the error i put on the first line
Click to expand...
Click to collapse
remove all old drivers and restart
install http://forum.xda-developers.com/showthread.php?p=42407269&__utma=248941774.1031819907.1403635167.1403781687.1403790944.7&__utmb=248941774.1.10.1403790944&__utmc=248941774&__utmx=-&__utmz=248941774.1403790944.7.7.utmcsr=google|utmccn=%28organic%29|utmcmd=organic|utmctr=%28not%20provided%29&__utmv=-&__utmk=239174656
place the android sdk windows file attached here in c: drive
now start cmd prompt and type
Code:
cd c:\android-sdk-windows\platform-tools
now proceed with fastboot command in this order
Code:
fastboot flash bootloader C:/hammerhead-ktu84m/bootloader.img
fastboot reboot-bootloader
fastboot flash radio C:/hammerhead-ktu84m/radio.img
fastboot reboot-bootloader
fastboot flash system C:/hammerhead-ktu84m/system.img
fastboot flash userdata C:/hammerhead-ktu84m/userdata.img
fastboot flash boot C:/hammerhead-ktu84m/boot.img
fastboot flash recovery C:/hammerhead-ktu84m/recovery.img
fastboot erase cache
note:remember to extract the factory stock image till u see these files attached and place it in C: drive and yes the built name should be same as yours of 4.4.4 then KTU84P inplace of ktu84m

shhbz said:
remove all old drivers and restart
install http://forum.xda-developers.com/sho...mctr=(not provided)&__utmv=-&__utmk=239174656
place the android sdk windows file attached here in c: drive
now start cmd prompt and type
Code:
cd c:\android-sdk-windows\platform-tools
now proceed with fastboot command in this order
Code:
fastboot flash bootloader C:/hammerhead-ktu84m/bootloader.img
fastboot reboot-bootloader
fastboot flash radio C:/hammerhead-ktu84m/radio.img
fastboot reboot-bootloader
fastboot flash system C:/hammerhead-ktu84m/system.img
fastboot flash userdata C:/hammerhead-ktu84m/userdata.img
fastboot flash boot C:/hammerhead-ktu84m/boot.img
fastboot flash recovery C:/hammerhead-ktu84m/recovery.img
fastboot erase cache
note:remember to extract the factory stock image till u see these files attached and place it in C: drive and yes the built name should be same as yours of 4.4.4 then KTU84P inplace of ktu84m
Click to expand...
Click to collapse
Too Long. 15 second installer is the best way to get adb and fastboot. See previous post
Sent from my Nexus 5 using Tapatalk

rootSU said:
Too Long. 15 second installer is the best way to get adb and fastboot. See previous post
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
was unable to find link to 15 second installer as what i remember was the minimal adb and fastboot and both works great and flash-all.bat script does not work evrytime so just wanted the guy to be sure the he type the commands in right direction instead getting error cant find and stuff

shhbz said:
was unable to find link to 15 second installer as what i remember was the minimal adb and fastboot and both works great
Click to expand...
Click to collapse
1b1 in the link in my signature.
Minimal is fine but you have to manually add to environment variables or cd to the directory but that's all done with the 15 seconds one.
Sent from my Nexus 5 using Tapatalk

Thanks for the help guys.
RootSU, you saved me haha, was sat at work stressing trying to sort the mess I made out!
I'm all stock now... But the screen keeps going off because of the proximity sensor haha -_-
Thanks again though. Can always count on a Yorkshireman

The important thing is to remain calm and know it can be fixed
Sent from my Nexus 5 using Tapatalk

[Help] Moto G 4G peregrine issues

Hello,
I have followed the tutorials to unlock the bootloader of my moto G 4G : the bootloader is unlocked and I have removed the message when starting the phone with this tutorial : forum.xda-developers.com/moto-g/4g-development/logo-remove-bootloader-unlocked-warning-t2794104
Anyway, I would like now to install a recovery CWM with this tutorial :
http://forum.xda-developers.com/moto-g/4g-development/recovery-unofficial-cwm-6-0-5-0-t2818161
But when I do so, I have the following message on the screen of my phone : "Mismatch partition size (recovery)"
And when I boot on the bootloader then select recovery but nothing appears, just a black screen.
The status code of my bootloader is : 3 and it says "Device is unlocked".
I can boot to CWM from the computer with : fastboot boot recovery.img
but when I type : fastboot flash recovery CWM-6.0.5.0-peregrine.img I get this error.
Can someone help me please ?
Thank you in advance.

Ferguson35000 said:
Hello,
I have followed the tutorials to unlock the bootloader of my moto G 4G : the bootloader is unlocked and I have removed the message when starting the phone with this tutorial : forum.xda-developers.com/moto-g/4g-development/logo-remove-bootloader-unlocked-warning-t2794104
Anyway, I would like now to install a recovery CWM with this tutorial :
http://forum.xda-developers.com/moto-g/4g-development/recovery-unofficial-cwm-6-0-5-0-t2818161
But when I do so, I have the following message on the screen of my phone : "Mismatch partition size (recovery)"
And when I boot on the bootloader then select recovery but nothing appears, just a black screen.
The status code of my bootloader is : 3 and it says "Device is unlocked".
I can boot to CWM from the computer with : fastboot boot recovery.img
but when I type : fastboot flash recovery CWM-6.0.5.0-peregrine.img I get this error.
Can someone help me please ?
Thank you in advance.
Click to expand...
Click to collapse
I'm stil stuck.
Is there anybody able to help me ?
Thank you.

Ferguson35000 said:
I'm stil stuck.
Is there anybody able to help me ?
Thank you.
Click to expand...
Click to collapse
I got this problem when installing CWM too. I believed the problem is in this line:
fastboot flash recovery CWM-6.0.5.0-peregrine.img
Click to expand...
Click to collapse
instead, you could try this:
fastboot boot flash recovery CWM-6.0.5.0-peregrine.img
When I did this, it worked. Give it a try. You could also try this little program, I changed CWM to TWRP with it.
http://forum.xda-developers.com/moto-g/4g-development/moto-g-4g-easyrecovery-toolkit-t2856710

UncolourTV said:
I got this problem when installing CWM too. I believed the problem is in this line:
instead, you could try this:
fastboot boot flash recovery CWM-6.0.5.0-peregrine.img
When I did this, it worked. Give it a try. You could also try this little program, I changed CWM to TWRP with it.
http://forum.xda-developers.com/moto-g/4g-development/moto-g-4g-easyrecovery-toolkit-t2856710
Click to expand...
Click to collapse
Hello Hello,
Thank you for answering.
The command : fastboot boot flash recovery CWM-6.0.5.0-peregrine.img doesn't work because there is too much arguments. It gives me that answer :
cannot load 'flash': No such file or directory
I retried the right command but still the same problem.
I also tried the small program given by this URL on linux : http://forum.xda-developers.com/moto-g/4g-development/moto-g-4g-easyrecovery-toolkit-t2856710
My computer under Ubuntu fails to recognize the device. The device shown is empty.
I will try it on windows then come back here to tell you what happened.

Ferguson35000 said:
Hello Hello,
Thank you for answering.
The command : fastboot boot flash recovery CWM-6.0.5.0-peregrine.img doesn't work because there is too much arguments. It gives me that answer :
cannot load 'flash': No such file or directory
I retried the right command but still the same problem.
I also tried the small program given by this URL on linux : http://forum.xda-developers.com/moto-g/4g-development/moto-g-4g-easyrecovery-toolkit-t2856710
My computer under Ubuntu fails to recognize the device. The device shown is empty.
I will try it on windows then come back here to tell you what happened.
Click to expand...
Click to collapse
I have the same issue with this program under linux or windows, it doesn't recognize my device. I have activated USB debug, tried under bootloader or with the phone normally started but nothing better.
only fastboot boot recovery.img works.

You have to flash the recovery with mfastboot from motorola when flashing partitions else you will get the size mismatched error.
Standard fastboot is only good for basic things such as getvar etc.
Always flash with mfastboot and it will not error out.
So the command will then be mfastboot flash recovery CWM-6.0.5.0-peregrine.img which should then work without issues

hacktrix2006 said:
You have to flash the recovery with mfastboot from motorola when flashing partitions else you will get the size mismatched error.
Standard fastboot is only good for basic things such as getvar etc.
Always flash with mfastboot and it will not error out.
So the command will then be mfastboot flash recovery CWM-6.0.5.0-peregrine.img which should then work without issues
Click to expand...
Click to collapse
Thank you for answering.
I will try this then come back.

Ferguson35000 said:
Thank you for answering.
I will try this then come back.
Click to expand...
Click to collapse
Same error :
I still have the mismatch thing with mfastboot ...

Have you tried going back to a stock 4.4.4 if you have ota'd to 4.4.4 you need 4.4.4 stock image.

hacktrix2006 said:
Have you tried going back to a stock 4.4.4 if you have ota'd to 4.4.4 you need 4.4.4 stock image.
Click to expand...
Click to collapse
Hello, I have bought the phone less than one month ago.
It was directly on 4.4.4 after unpacking.
Have you tried renaming the CWM file? Maybe the "-" are a problem although I highly doubt it. Did you try re downloading the file? Running the command window as an administrator? Last resort, you could use TWRP, I'm running on this currently and haven't had any problems installing/flashing ROMs with it and imo prefer it over CWM.
Click to expand...
Click to collapse
I have tried both and they both have the same problem :/ CWM as well as TWRP...
Still no idea what happens.

same problem
I got the same problem using mac..
Impossible to install cwm or twrp also.. i cannot enter in the recovery mode any more
the boot loader is unlocked. I don't know whats going on

kosamuky said:
I got the same problem using mac..
Impossible to install cwm or twrp also.. i cannot enter in the recovery mode any more
the boot loader is unlocked. I don't know whats going on
Click to expand...
Click to collapse
Did you find any solutions for this ?
I'm still stuck
Is it normal when entering the bootloader to have the message :
"Device is UNLOCKED. Status code: 3 "
Is it the right status code ?
Thank you

Back to stock
Ferguson35000 said:
Did you find any solutions for this ?
I'm still stuck
Is it normal when entering the bootloader to have the message :
"Device is UNLOCKED. Status code: 3 "
Is it the right status code ?
Thank you
Click to expand...
Click to collapse
Yes its normal if you have unlocked your bootloader
To get back to stock, download a stock Fw for your device model and region, you can find a link for one if you enter the moto g section of this site and head to moto 4g lte android development section (only section specifically for peregrine model) unpack the fw files into your fastboot directory (windows) reboot your phone to fastboot mode (where u saw the status code) then press control + shift + right click to launch a command prompt window here (from within fastboot directory in windows) then copy and paste these fastboot commands 1 by 1 pressing enter each time until compete.
mfastboot flash partition gpt.bin
mfastboot flash motoboot motoboot.img
mfastboot flash logo logo.bin
mfastboot flash boot boot.img
mfastboot flash recovery recovery.img
mfastboot flash system system.img_sparsechunk.0
mfastboot flash system system.img_sparsechunk.1
mfastboot flash system system.img_sparsechunk.2
mfastboot flash system system.img_sparsechunk.3
mfastboot flash modem NON-HLOS.bin
mfastboot erase modemst1
mfastboot erase modemst2
mfastboot flash fsg fsg.mbn
mfastboot erase cache
mfastboot erase userdata
mfastboot reboot

So you mean, it is compulsory to have stock ROM in order to install the recovery ?
Because my problem is not to return to stock, it is to install a proper recovery (CWM or TWRP) in order to boot on it without my computer.
Thanks for your help

No but I think your problem is you have corrupt the recovery partition size maybe through bad flash or something so ur unable now to flash a recovery as the partition size is for different device or damaged and flashing cwm will no longer work as the cwm image is too big or too small for the allocation assigned to it as the devices core partition table has changed (can happen when u flash something for the falcon when you have a peregrine), I would flash back to stock via that method to restore to stock partition sizes and then reroot and flash cwm again after, just a guess from my own understanding.
Sent from my XT1039 using XDA Free mobile app

Guys I had the same trouble installing the recovery with the mismatched partition size message. This message is normal and the recovery is already installed on your device. The problem i had when selecting the recovery with the following black screen was that I used the Power Button instead of the up Button.
5) using volume down scroll to recovery and then use volume up to select

Accidentally delete everything using TWRP in "wipe"

Hey,
first of all i KNOW there is a subject with nearly the exact same topic, and i followed the directions but somethng doesn't work.
I still have TWRP on the phone, and when im in bootloader mode and run "fastboot devices" i see the result.
but i can't seem to ADB push or anything else (maybe im missing some commands?)
so i used the NRT root kit and i use the "fastboot flash" function and install the .img file - the software says my device is identified and it installs the system.img file (found on the "image-hammerhead-mra58k" zip), but then the device boots to TWRP and still can't boot to the system itself.
help please!

Sideload a factory rom and u will be fine. U can do it in the advanced portion of TWRP, but u need a pc, or ur hit
Sent from my Nexus 6 using Tapatalk

Sounds to me like you're using adb commands in fastboot.
Boot into bootloader (not recovery)
Type fastboot devices
It should return showing your device
Then you need to make sure you have stock img's downloaded and completely extracted so you have all the img files in the folder you're running fastboot from (rename the radio to simply radio.img)
Then type
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash radio radio.img
Then boot back into recovery and wipe cache and dvalik for just in case fun
Then reboot system and wait
Sent from my Xperia z5 by Tapatalk

Thank you very very much guys!
that worked! WOOHOO!!

Good good!
Sent from my Xperia z5 by Tapatalk

Tried to root moto g 2015 indian version with kingroot app now stuck in startup menu

I tried to root my MOTO G 2015 XT1550 using KINGROOT app.At that time it was running marshmallow 6.01 ,after running the kingroot application the phone restarted and stuck in startup menu with fastboot mode.Please help me out of this

Are u able to open stock recivery?
And have unlocked bootloader?

Amirphp said:
Are u able to open stock recivery?
And have unlocked bootloader?
Click to expand...
Click to collapse
No,I have not unlocked the bootloader,what i did was that i installed kingroot app and tried to root from the app.I don't know what it did to my device but now its stuck in fastboot mode.Please tell me how to open stock recovery.

divyandu said:
I tried to root my MOTO G 2015 XT1550 using KINGROOT app.At that time it was running marshmallow 6.01 ,after running the kingroot application the phone restarted and stuck in startup menu with fastboot mode.Please help me out of this
Click to expand...
Click to collapse
1. Stay calm.
1.a You cannot root your phone without unlocking bootloader.
1.b. You will need to do a thorough reading of how to unlock bootloader from threads in this forum or else where. You will also need to read and understand the process of fastboot mode of flashing stock firmware.
2. Since you are able to enter fastboot mode connect your mobile to your PC with your USB chord, open the minimal adb fastboot mode, try to get the unlock key, visit Motorola site and get your bootloader unlock key. There are other threads explaning how to do this. Download the correct stock firmware identified based on the phone model no. Eg xt1550 dual sim and store it onto your PC, you will also need the minimal adb fastboot file, Motorola drivers, twrp3.0., SuperSU 2.62-3 ( no other version of SuperSU works, only this version)
3. Once you unlock your bootloader, flash the stock firmware which you need to download from other thread of this forum using fastboot mode. Note, marshmallow 6.0.1 has 7 sparsechunk files. So be careful about fast boot commands. Do not use the commands you find on the stock firmware thread blindly as these have commands only for 6 sparsechunk files. You may open the flash file from the downloaded firmware to get an idea of all the commands to be typed and their respective partitions too.
4. Flash twrp to replace stock recovery. Enter recovery from fastboot mode using volume keys to navigate and powerkey to select.
5. Once into twrp, press mounts tab and tick to mount USB storage, and copy the SuperSU 2.62-3 file into the external memory card of your phone from pc. Install this SuperSU.zip file without unzipping it by pressing the install tab in twrp home screen and selecting the zip file and sliding the installer.
6. Reboot system. Done! You have your phone rooted the perfect way.

When I switch on my device(moto g3) the following message appears.
Start Up Failed
Your device didn't startup successfully.
Use the Software Repair Assistant on your computer to repair your device.
Connect your device to your computer to get the Software Repair Assistant.
AP Fastboot Flash Mode (Secure)
Failed to verify hab image boot
failed to validate boot image
ERROR: Failed to pass validation,backup to fastboot
Boot up failed
Please help with a solution asap??

divyandu said:
When I switch on my device(moto g3) the following message appears.
Start Up Failed
Your device didn't startup successfully.
Use the Software Repair Assistant on your computer to repair your device.
Connect your device to your computer to get the Software Repair Assistant.
AP Fastboot Flash Mode (Secure)
Failed to verify hab image boot
failed to validate boot image
ERROR: Failed to pass validation,backup to fastboot
Boot up failed
Please help with a solution asap??
Click to expand...
Click to collapse
Dear friend please have patience...
These things require a cool mind...
Did you try the hardware way of entering the fastboot mode? If not keep the volume down and power button pressed for some time till ulyou enter fastboot mode. Basically there is no info if you have tried to follow what was given earlier...have you tried it?

I am unable to unlock the bootloader from adb.
The problem I think is that my phone's USB debugging is off.Anybody plz tell me how do I turn my bootloader on from fastboot or recovery mode.

divyandu said:
No,I have not unlocked the bootloader,what i did was that i installed kingroot app and tried to root from the app.I don't know what it did to my device but now its stuck in fastboot mode.Please tell me how to open stock recovery.
Click to expand...
Click to collapse
@divyandu follow this and let me know if it works.
http://forum.xda-developers.com/2015...k-6-0-t3349468
you can get the Factory Firmware's on this Link.
http://forum.xda-developers.com/2015...mages-t3169639

divyandu said:
I am unable to unlock the bootloader from adb.
The problem I think is that my phone's USB debugging is off.Anybody plz tell me how do I turn my bootloader on from fastboot or recovery mode.
Click to expand...
Click to collapse
Dear friend,
You need not have your bootloader unlocked to flash factory firmware
Quote from the XDA forum factory firmware link:
"Frequently Asked Questions:
Can I restore Factory Firmware if my Bootloader is locked?
Yes."
And if you are still stuck with a phone stuck at logo or is looping at the boot, either follow steps given elsewhere in this forum or follow the method that I am enumerating below which is what I would have done (which in principle is same as given elsewhere).
Getting your phone revived is your first priority. Unlocking bootloader and rooting is secondary.
You would be needing a pc with administrator privilege, internet connection and of course your phone along with the usb cable.
You would be needing the drivers for your phone, minimal adb and fastboot files, stock firmware for your phone model. All these files are available in the XDA forum as per links provided by others or as per this link
http://forum.xda-developers.com/2015-moto-g/general/guide-fastboot-flashing-factory-t3187750
1. Correctly install drivers onto your pc using administrator privileges.
2. Unzip and Install the minimal adb and fastboot files onto your pc into some specific directory and click the executable files once. This would ensure that all the files are loaded and dos prompt recognizes the adb and fastboot commands (commands are different for ADB stage and FASTBOOT stage, what you are going to use is directly the fastboot stage commands given below). Install as an administrator. Note this specific directory and file where you unzipped and installed the minimal adb file as you will need it in the below step.
3. Download the stock 6.0.1 mm firmware for XT1550 from the link below store it in you pc.
http://forum.xda-developers.com/2015-moto-g/general/index-moto-g-factory-firmware-images-t3169639
Unzip the stock firmware. Now copy all the files of the stock firmware (all of them) into the specific file of the minimal adb and fastboot which you unzipped into and installed earlier and noted the location. You need to copy all the firmware files into the minimal adb and fastboot directory as that way you avoid specifying the location of the files for each flash command which is both simple and saves us from a lot of mistakes.
4. After copying all the unzipped stock firmware files in the minimal adb fastboot directory, press the shift button on keyboard and right click the mouse on the screen where in a dialogue box appears and choose to open the command prompt in this directory. This will open a command prompt with default reference to the current directory.
5. In what ever condition your phone is in (other than the fastboot mode), press simultaneously the volume down key + power button together for about 8-10 secs. This action will automatically lead your phone to enter the fastboot mode. After entering the fastboot mode you can connect the phone to your pc using a usb cable and your pc should ring a note that it has detected the phone. To check if the pc has detected the phone and the link is established, type the following command in the command prompt window which you opened in step 4
fastboot devices
This command displays your device number if all is well in the command prompt window. NOW you are ready to flash the stock firmware I.E. after successful detection of the phone by your pc.
6. Carefully type each and every of the commands in italics or copy and paste them ONE by ONE and wait for each command to be executed. The commands are being given below to help you (these are for flashing the 6.0.1mm onto the XT1550 only) in the opened command prompt window (Ensure that you do not miss any of the commands and follow the order given below) :
fastboot oem fb_mode_set
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash logo logo.bin
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system system.img_sparsechunk.0
fastboot flash system system.img_sparsechunk.1
fastboot flash system system.img_sparsechunk.2
fastboot flash system system.img_sparsechunk.3
fastboot flash system system.img_sparsechunk.4
fastboot flash system system.img_sparsechunk.5
fastboot flash system system.img_sparsechunk.6
fastboot flash system system.img_sparsechunk.7
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
fastboot flash fsg fsg.mbn
fastboot erase cache
fastboot erase userdata
fastboot erase customize
fastboot erase clogo
fastboot oem fb_mode_clear
fastboot reboot
If you have done every thing correctly till now you should see the command prompt returning a OKAY afer each command with the time taken for flashing each file. This should revive your device first.
After this you may try unlocking the bootloader and rooting as the next step. But be patient and retain a cool head to read first and think clearly..... you will need it a lot as is necessary for such things... good luck and happy learning!!

Follow the instructions in this thread ...to unlock bootloader and root...
Works 100%.
http://forum.xda-developers.com/2015-moto-g/general/root-how-to-root-moto-g-2015-android-t3320113

arunhebbare said:
Dear friend,
You need not have your bootloader unlocked to flash factory firmware
Quote from the XDA forum factory firmware link:
"Frequently Asked Questions:
Can I restore Factory Firmware if my Bootloader is locked?
Yes."
And if you are still stuck with a phone stuck at logo or is looping at the boot, either follow steps given elsewhere in this forum or follow the method that I am enumerating below which is what I would have done (which in principle is same as given elsewhere).
Getting your phone revived is your first priority. Unlocking bootloader and rooting is secondary.
You would be needing a pc with administrator privilege, internet connection and of course your phone along with the usb cable.
You would be needing the drivers for your phone, minimal adb and fastboot files, stock firmware for your phone model. All these files are available in the XDA forum as per links provided by others or as per this link
http://forum.xda-developers.com/2015-moto-g/general/guide-fastboot-flashing-factory-t3187750
1. Correctly install drivers onto your pc using administrator privileges.
2. Unzip and Install the minimal adb and fastboot files onto your pc into some specific directory and click the executable files once. This would ensure that all the files are loaded and dos prompt recognizes the adb and fastboot commands (commands are different for ADB stage and FASTBOOT stage, what you are going to use is directly the fastboot stage commands given below). Install as an administrator. Note this specific directory and file where you unzipped and installed the minimal adb file as you will need it in the below step.
3. Download the stock 6.0.1 mm firmware for XT1550 from the link below store it in you pc.
http://forum.xda-developers.com/2015-moto-g/general/index-moto-g-factory-firmware-images-t3169639
Unzip the stock firmware. Now copy all the files of the stock firmware (all of them) into the specific file of the minimal adb and fastboot which you unzipped into and installed earlier and noted the location. You need to copy all the firmware files into the minimal adb and fastboot directory as that way you avoid specifying the location of the files for each flash command which is both simple and saves us from a lot of mistakes.
4. After copying all the unzipped stock firmware files in the minimal adb fastboot directory, press the shift button on keyboard and right click the mouse on the screen where in a dialogue box appears and choose to open the command prompt in this directory. This will open a command prompt with default reference to the current directory.
5. In what ever condition your phone is in (other than the fastboot mode), press simultaneously the volume down key + power button together for about 8-10 secs. This action will automatically lead your phone to enter the fastboot mode. After entering the fastboot mode you can connect the phone to your pc using a usb cable and your pc should ring a note that it has detected the phone. To check if the pc has detected the phone and the link is established, type the following command in the command prompt window which you opened in step 4
fastboot devices
This command displays your device number if all is well in the command prompt window. NOW you are ready to flash the stock firmware I.E. after successful detection of the phone by your pc.
6. Carefully type each and every of the commands in italics or copy and paste them ONE by ONE and wait for each command to be executed. The commands are being given below to help you (these are for flashing the 6.0.1mm onto the XT1550 only) in the opened command prompt window (Ensure that you do not miss any of the commands and follow the order given below) :
fastboot oem fb_mode_set
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash logo logo.bin
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system system.img_sparsechunk.0
fastboot flash system system.img_sparsechunk.1
fastboot flash system system.img_sparsechunk.2
fastboot flash system system.img_sparsechunk.3
fastboot flash system system.img_sparsechunk.4
fastboot flash system system.img_sparsechunk.5
fastboot flash system system.img_sparsechunk.6
fastboot flash system system.img_sparsechunk.7
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
fastboot flash fsg fsg.mbn
fastboot erase cache
fastboot erase userdata
fastboot erase customize
fastboot erase clogo
fastboot oem fb_mode_clear
fastboot reboot
If you have done every thing correctly till now you should see the command prompt returning a OKAY afer each command with the time taken for flashing each file. This should revive your device first.
After this you may try unlocking the bootloader and rooting as the next step. But be patient and retain a cool head to read first and think clearly..... you will need it a lot as is necessary for such things... good luck and happy learning!!
Click to expand...
Click to collapse
Ty everyone for the support and the quick answers.My phone is unbricked and is running 6.0.1
Special thanks arunhebbare your suggestion worked out finally

I tried to root my MOTO G 2015 XT1550 using KINGROOT app.At that time it was running marshmallow 6.01 ,after running the kingroot application the phone restarted and stuck in startup menu with fastboot mode.
:crying: When I switch on my device(moto g3) the following message appears.
Start Up Failed
Your device didn't startup successfully.
Use the Software Repair Assistant on your computer to repair your device.
Connect your device to your computer to get the Software Repair Assistant.
AP Fastboot Flash Mode (Secure)
Failed to verify hab image boot
failed to validate boot image
ERROR: Failed to pass validation,backup to fastboot
Boot up failed
plz help me

vidya_sagar said:
I tried to root my MOTO G 2015 XT1550 using KINGROOT app.At that time it was running marshmallow 6.01 ,after running the kingroot application the phone restarted and stuck in startup menu with fastboot mode.
:crying: When I switch on my device(moto g3) the following message appears.
Start Up Failed
Your device didn't startup successfully.
Use the Software Repair Assistant on your computer to repair your device.
Connect your device to your computer to get the Software Repair Assistant.
AP Fastboot Flash Mode (Secure)
Failed to verify hab image boot
failed to validate boot image
ERROR: Failed to pass validation,backup to fastboot
Boot up failed
plz help me
Click to expand...
Click to collapse
You tried the above solution a few posts back??
Broadcasted from Zeta Reticuli

Gravemind2015 said:
You tried the above solution a few posts back??
Broadcasted from Zeta Reticuli
Click to expand...
Click to collapse
i'm not sure about Enabling USB debugging. is that above process will work??when i don't enable usb debugging?
tnx for ur reply
---------- Post added at 10:45 AM ---------- Previous post was at 10:07 AM ----------
vidya_sagar said:
i'm not sure about Enabling USB debugging. is that above process will work??when i don't enable usb debugging?
tnx for ur reply
Click to expand...
Click to collapse
if u dont mind can u post the vedio of this process

bad
iam unlocked my boot loader in my moto g3 running 6.0.1...after i try to flash twrp to root ..but it is no worked ..so i use king root app to root my phone root installed successfully ...but my sims signels are not showing ...so i do hard reset ...after phone is on and stucks at language selection what should i do

vidya_sagar said:
i'm not sure about Enabling USB debugging. is that above process will work??when i don't enable usb debugging?
tnx for ur reply
---------- Post added at 10:45 AM ---------- Previous post was at 10:07 AM ----------
if u dont mind can u post the vedio of this process
Click to expand...
Click to collapse
My internet is not fast enough for a video upload sorry. But if you are not sure about the process you can search lost101's firmware flashing guide in general section. I have flashed it and it works.
Broadcasted from Zeta Reticuli