Database Info

Preflash validation failed trying to flash stock 4.4.4

I have a bootloader unlocked XT1032 MOTO G on UK EE network. I have been trying to flash stock 4.4.4 (so that I can upgrade to OTA lollipop) but am getting a 'Preflash validation failed error'.
I've tried various things to get it to flash the images but nothing has worked.
Can anyone suggest how I might get this work?
Code:
C:\motog>mfastboot oem lock begin
...
(bootloader) Ready to flash signed images
OKAY [ 1.660s]
finished. total time: 1.660s
C:\motog>mfastboot oem lock begin
...
(bootloader) Ready to flash signed images
OKAY [ 1.646s]
finished. total time: 1.647s
C:\motog>mfastboot flash partition gpt.bin
target max-sparse-size: 256MB
sending 'partition' (32 KB)...
OKAY [ 0.031s]
writing 'partition'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.374s

Just skip flashing the gpt.bin and motoboot.img but flash the rest. The phone should still work.

audit13 said:
Just skip flashing the gpt.bin and motoboot.img but flash the rest. The phone should still work.
Click to expand...
Click to collapse
Thanks for the suggestion, however there's others that fail too:
boot.img won't flash
Recovery does flash but I get the broken android with 'No command' message when trying to boot to recovery
System images won't flash
Code:
C:\motog>mfastboot flash boot boot.img
target max-sparse-size: 256MB
sending 'boot' (10240 KB)...
OKAY [ 0.372s]
writing 'boot'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.840s
C:\motog>mfastboot flash recovery recovery.img
target max-sparse-size: 256MB
sending 'recovery' (10240 KB)...
OKAY [ 0.372s]
writing 'recovery'...
OKAY [ 0.966s]
finished. total time: 1.645s
C:\motog>mfastboot flash system system.img_sparsechunk.0
target max-sparse-size: 256MB
sending 'system' (259277 KB)...
OKAY [ 8.643s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 9.082s
It will still boot normally after that. Any ideas?

Crazy question but are you sure you are flashing the correct rom for your phone? Was it on gpe before?

audit13 said:
Crazy question but are you sure you are flashing the correct rom for your phone? Was it on gpe before?
Click to expand...
Click to collapse
I'm pretty sure I am. I did try and convert to GPE using the AIO tool (when trying to resolve the issues) but I've seen nothing to suggest this has actually worked.
The phone has previously been rooted, but isn't currently.
System version is showing as:
210.12.40.falcon_umts.EESL.en.GB
Build number:
KXB21.14-L1.40
Kernel version:
3.4.42-gb89c9dd
[email protected] #1
Fri Jun 20 07:09:11 CDT 2014
Thanks for the help, it's very much appreciated!

@audit13
Update for lollipop in moto G Don´t work, ota Says "Updated"
HELP..
Same problem here preflash validation failed for Logo, GPT and Motoboot
(Downgrade from Lollipop 5.1 (XD1039 RETBR) To Kitkat 4.4.4
BOOOTLOADER is Unlocked.

[Completed] Xt1032 problem

Hi every one its first thread i write it here iam sorry because its about problem ^_^
so my problem withe my device since three weeks i dont know exactly what happen but here what i get when i flash it
please i need help my phone is done i cannot use it
C:\Program Files\Android\android-sdk\platform-tools>fastboot flash partition gpt
.bin
target reported max download size of 536870912 bytes
sending 'partition' (32 KB)...
OKAY [ 0.049s]
writing 'partition'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.348s
C:\Program Files\Android\android-sdk\platform-tools>fastboot flash motoboot moto
boot.img
target reported max download size of 536870912 bytes
sending 'motoboot' (1953 KB)...
OKAY [ 0.141s]
writing 'motoboot'...
(bootloader) Motoboot: Preflash validation for tz
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.438s
C:\Program Files\Android\android-sdk\platform-tools>fastboot flash logo logo.bin
target reported max download size of 536870912 bytes
sending 'logo' (1060 KB)...
OKAY [ 0.109s]
writing 'logo'...
OKAY [ 0.172s]
finished. total time: 0.281s
C:\Program Files\Android\android-sdk\platform-tools>fastboot flash boot boot.img
target reported max download size of 536870912 bytes
sending 'boot' (10240 KB)...
OKAY [ 0.422s]
writing 'boot'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.903s
C:\Program Files\Android\android-sdk\platform-tools>fastboot flash recovery reco
very.img
target reported max download size of 536870912 bytes
sending 'recovery' (10240 KB)...
OKAY [ 0.391s]
writing 'recovery'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.859s
C:\Program Files\Android\android-sdk\platform-tools>

Hi, thank you for using XDA Assist. Try updating your sdk platform tools to the latest version of fastboot. See this, http://forum.xda-developers.com/showthread.php?t=1920265 and this, http://forum.xda-developers.com/showthread.php?t=2588979

jd1639 said:
Hi, thank you for using XDA Assist. Try updating your sdk platform tools to the latest version of fastboot. See this, http://forum.xda-developers.com/showthread.php?t=1920265 and this, http://forum.xda-developers.com/showthread.php?t=2588979
Click to expand...
Click to collapse
okey i will try and let you know after then what happen

jd1639 said:
Hi, thank you for using XDA Assist. Try updating your sdk platform tools to the latest version of fastboot. See this, http://forum.xda-developers.com/showthread.php?t=1920265 and this, http://forum.xda-developers.com/showthread.php?t=2588979
Click to expand...
Click to collapse
its same problem

OK, see this, http://forum.xda-developers.com/showthread.php?t=2537119. Question 30. If you need further help as in that thread.

thank you
jd1639 said:
OK, see this, http://forum.xda-developers.com/showthread.php?t=2537119. Question 30. If you need further help as in that thread.
Click to expand...
Click to collapse
i did it i was to unlock bootloader that is was now my device working good :laugh::laugh::laugh::good::good::good:

Thread closed.

XT1541 broken after attempt do factory reset

Dear all,
I own a XT1541 and updated to Marhsmallow via OTA few weeks ago. I encountered some troubles with the performance. I also had the issue that a single app was attempted to be optimized on every boot. Therefore, I decided to reset it to factory settings. However, it seemed that this process failed (waited nearly for an hour to complete but nothing happened).
After rebooting then manually, I am stuck in a fastboot message
AP Fastboot Flash Mode (Secure)
failed to validate boot image
ERROR: failed to pass validation, backup to fastboot
Fastboot Reason: Fall-through from charger boot mode
CID Read Failure
Invalid CID status 0x69
I can access the device via my Linux using fastboot command. What do you propose to recover from my problem.
Thanks

IK1981 said:
Dear all,
I own a XT1541 and updated to Marhsmallow via OTA few weeks ago. I encountered some troubles with the performance. I also had the issue that a single app was attempted to be optimized on every boot. Therefore, I decided to reset it to factory settings. However, it seemed that this process failed (waited nearly for an hour to complete but nothing happened).
After rebooting then manually, I am stuck in a fastboot message
AP Fastboot Flash Mode (Secure)
failed to validate boot image
ERROR: failed to pass validation, backup to fastboot
Fastboot Reason: Fall-through from charger boot mode
CID Read Failure
Invalid CID status 0x69
I can access the device via my Linux using fastboot command. What do you propose to recover from my problem.
Thanks
Click to expand...
Click to collapse
Try flashing the factory image here are the instructions
http://forum.xda-developers.com/2015-moto-g/general/guide-fastboot-flashing-factory-t3187750

bobby0724 said:
Try flashing the factory image here are the instructions
http://forum.xda-developers.com/2015-moto-g/general/guide-fastboot-flashing-factory-t3187750
Click to expand...
Click to collapse
Already tried this. Already fails at first command... When doing this for the first time, it takes up to one minute to get a response. When retrying, it fails immediately
Code:
~/Downloads/XT1541_OSPREY_RETEU_6.0_MPI24.65-33.1_cid7_subsidy-DEFAULT_CFC__v2.xml# fastboot oem fb_mode_set
...
FAILED (remote failure)
finished. total time: 55.425

Try usuing my Motorola downgrade tool , or Motorola utility , created by me , to try and fix problems like this. Links can be found in the general section of Moto g 3 forums , or in Moto g 3 devdb. Therealduff1 is the username you are looking for . I am happy to try and help you with this !

therealduff1 said:
Try usuing my Motorola downgrade tool , or Motorola utility , created by me , to try and fix problems like this. Links can be found in the general section of Moto g 3 forums , or in Moto g 3 devdb. Therealduff1 is the username you are looking for . I am happy to try and help you with this !
Click to expand...
Click to collapse
Thanks for your help. Tried it with your tool but as far as I could see I land in the same troubles.
Code:
OSPREY_RETEU_6.0_MPI24.65-33_cid7_subsidy
please move all of the firmware files into the moto toolkit directory (the same folder containing toolkit.py)
Please make sure usb debugging is turned on in developer settings, then type 'done' into this promptdone
error: device '(null)' not found
Has your device successfully loaded bootloader mode ? please type 'yes' if it has successfully loadedyes
Press enter to confirm you would like to upgrade to android marshmallow ;)
target reported max download size of 268435456 bytes
sending 'partition' (32 KB)...
OKAY [ 0.000s]
writing 'partition'...
(bootloader) This may take a few seconds, if a
(bootloader) different partition table is being
(bootloader) flashed since we need to backup
(bootloader) and restore a few partitions
(bootloader) Flashing primary GPT image...
(bootloader) Failed to write primary GPT.
(bootloader) Failed to program partition table
FAILED (remote failure)
finished. total time: 55.795s
Partition table has been flashed
target reported max download size of 268435456 bytes
sending 'bootloader' (2546 KB)...
OKAY [ 0.094s]
writing 'bootloader'...
(bootloader) flashing sbl1 ...
(bootloader) Failed to erase partition
(bootloader) Failed to flash sbl1
FAILED (remote failure)
finished. total time: 1.438s
Bootloader has been flashed
target reported max download size of 268435456 bytes
sending 'logo' (1352 KB)...
OKAY [ 0.062s]
writing 'logo'...
(bootloader) Failed to erase partition
(bootloader) Failed to flash partition logo
FAILED (remote failure)
finished. total time: 0.172s
boot logo has been flashed
target reported max download size of 268435456 bytes
sending 'boot' (16384 KB)...
OKAY [ 0.530s]
writing 'boot'...
(bootloader) Failed to erase partition
(bootloader) Failed to flash partition boot
FAILED (remote failure)
finished. total time: 1.093s
boot.img has been flashed
target reported max download size of 268435456 bytes
sending 'recovery' (16484 KB)...
OKAY [ 0.531s]
writing 'recovery'...
(bootloader) Failed to erase partition
(bootloader) Failed to flash partition recovery
FAILED (remote failure)
finished. total time: 1.094s
Stock marshmallow recovery has now been flashed
target reported max download size of 268435456 bytes
sending 'system' (238438 KB)...
OKAY [ 7.500s]
writing 'system'...
(bootloader) Failed to erase partition
FAILED (remote failure)
finished. total time: 15.891s
System part 1 has been flashed
target reported max download size of 268435456 bytes
sending 'system' (238552 KB)...
OKAY [ 7.492s]
writing 'system'...
(bootloader) Failed to flash sparse image
FAILED (remote failure)
finished. total time: 9.608s
System part 2 has been flashed
target reported max download size of 268435456 bytes
sending 'system' (256695 KB)...
One thing that confuses me is the fact that the tool tells me that I shall turn on the USB debug mode. However, since Android does not boot any longer, I have no chance to do this in the Settings. Is there any way to enable this debug mode in another way?

Unlock The Motorola G (Moto G) Bootloader! doesnt work. Flash doesnt work.

Unlock The Motorola G (Moto G) Bootloader! doesnt work. Flash doesnt work.
ok This is what I did.
Go Motorola Moto G 3rd Gen. Android 5.0.1, than I download the KingRoot App, to uninstall some bloadware apps. was fine. than few days ago, I updated Motorola to Android 6. Next day I watched some youtube videos and it went to hard reset mode. Since than I can do nothing. Cant unlock the boot loader even with the code from Motorola. Cant flash it just nothing. Im out of ideas. Would like to take a hammer and just smash it. Please someone help me. And I cant turn on the developer mode. take a look on the error which I get, over and over and over again.
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>adb reboot-bootloader
error: device '(null)' not found
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot devices
ZY2225JZ7Z fastboot
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>adb reboot-bootloader
error: device '(null)' not found
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot oem fb_mode_set
...
OKAY [ 0.130s]
finished. total time: 0.140s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash partition gp
t.bin
target reported max download size of 268435456 bytes
sending 'partition' (32 KB)...
OKAY [ 0.090s]
writing 'partition'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.600s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash bootloader b
ootloader.img
target reported max download size of 268435456 bytes
sending 'bootloader' (2546 KB)...
OKAY [ 0.270s]
writing 'bootloader'...
(bootloader) flashing sbl1 ...
(bootloader) flashing aboot ...
(bootloader) flashing tz ...
(bootloader) flashing hyp ...
(bootloader) flashing rpm ...
OKAY [ 1.850s]
finished. total time: 2.130s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash bootloader b
ootloader.img
target reported max download size of 268435456 bytes
sending 'bootloader' (2546 KB)...
OKAY [ 0.250s]
writing 'bootloader'...
(bootloader) flashing sbl1 ...
(bootloader) flashing aboot ...
(bootloader) flashing tz ...
(bootloader) flashing hyp ...
(bootloader) flashing rpm ...
OKAY [ 1.890s]
finished. total time: 2.150s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash logo logo.bi
n
target reported max download size of 268435456 bytes
sending 'logo' (917 KB)...
OKAY [ 0.220s]
writing 'logo'...
OKAY [ 0.180s]
finished. total time: 0.410s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash boot boot.im
g
target reported max download size of 268435456 bytes
sending 'boot' (16384 KB)...
OKAY [ 0.680s]
writing 'boot'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 1.350s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash recovery rec
overy.img
target reported max download size of 268435456 bytes
sending 'recovery' (16484 KB)...
OKAY [ 0.670s]
writing 'recovery'...
OKAY [ 1.410s]
finished. total time: 2.090s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash system syste
m.img_sparsechunk.0
target reported max download size of 268435456 bytes
sending 'system' (261561 KB)...
OKAY [ 8.290s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 8.970s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash system syste
m.img_sparsechunk.1
target reported max download size of 268435456 bytes
sending 'system' (262142 KB)...
OKAY [ 8.310s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 8.440s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash system syste
m.img_sparsechunk.2
target reported max download size of 268435456 bytes
sending 'system' (262140 KB)...
OKAY [ 8.310s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 8.470s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash system syste
m.img_sparsechunk.3
target reported max download size of 268435456 bytes
sending 'system' (240126 KB)...
OKAY [ 7.620s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 7.710s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash system syste
m.img_sparsechunk.4
target reported max download size of 268435456 bytes
sending 'system' (242526 KB)...
OKAY [ 7.700s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 7.820s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash system syste
m.img_sparsechunk.5
target reported max download size of 268435456 bytes
sending 'system' (121656 KB)...
OKAY [ 3.910s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 4.030s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash modem NON-HL
OS.bin
< waiting for device >
target reported max download size of 268435456 bytes
sending 'modem' (36932 KB)...
OKAY [ 1.170s]
writing 'modem'...
OKAY [ 2.430s]
finished. total time: 3.620s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot erase modemst1
erasing 'modemst1'...
OKAY [ 0.060s]
finished. total time: 0.070s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot erase modemst2
erasing 'modemst2'...
OKAY [ 0.030s]
finished. total time: 0.030s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot flash fsg fsg.mbn
target reported max download size of 268435456 bytes
sending 'fsg' (1923 KB)...
OKAY [ 0.250s]
writing 'fsg'...
OKAY [ 0.170s]
finished. total time: 0.420s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot erase cache
erasing 'cache'...
OKAY [ 0.130s]
finished. total time: 0.140s
C:\Users\Nikon\Desktop\adb-fastboot-latest_win_linux>fastboot reboot
rebooting...
Please someone help

plz tell me you didnt flash an android 5.0 bootloader.img on a device that has been previously updated to 6.0 .. . If you did then you may have hard bricked it. Try downloading 6.0 firmware

therealduff1 said:
plz tell me you didnt flash an android 5.0 bootloader.img on a device that has been previously updated to 6.0 .. . If you did then you may have hard bricked it. Try downloading 6.0 firmware
Click to expand...
Click to collapse
Thank you for your Info. never thought that it would be so quick here. So yesterday I downloaded android 6, did the flashing again. and it works fine now.
So for all the other Motorola Moto G 3rd generations users.
When you root the phone in Android 5, and you update it with official OTA Android 6, don't root the phone again with some App like KingRoot, as the phone OS might be bricked. Also to flash the Motorola, in that status which I got. You don't need the boot loader unlocking code from Motorola, eather you don't need to activate developer mode. Just download Android 6, and flash it. FASTBOOT DEVICES - code to be sure your phone is recognize it by your PC.
Thanks again to the XDA people and (therealduff1) which help me very quick

Require some help and some advice if possible.

Hi There,
I hope someone can advise and possibly provide help resolving this problem.
The Moto G4 XT1622 is not able to boot to OS, It only boots into bootloader, cannot go into recovery and cannot go into Factory Mode etc.
The error i get on the phone is....
"Start Up Failed"
Failed to verify hab image boot
Failed to verify boot image
ERROR: Failed to pass validation, backup to fastboot
Fastboot Reason: Fall-through from normal boot mode
I have tried to clear fb_mode and tried to unlock the bootloader without success.
I have tried various stock roms to get this fixed. The phone has never been unlocked and not been rooted.
C:\adb>fastboot oem fb_mode_set
...
OKAY [ -0.000s]
finished. total time: -0.000s
C:\adb>fastboot flash partition gpt.bin
target reported max download size of 536870912 bytes
sending 'partition' (32 KB)...
OKAY [ 0.031s]
writing 'partition'...
(bootloader) Security version downgrade
(bootloader) Image primary_gpt failed validation
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.094s
C:\adb>fastboot flash bootloader bootloader.img
target reported max download size of 536870912 bytes
sending 'bootloader' (3651 KB)...
OKAY [ 0.172s]
writing 'bootloader'...
(bootloader) validating: bootloader.default.xml ...
(bootloader) Security version downgrade
(bootloader) Image aboot failed validation
(bootloader) Preflash validation failed
(bootloader) will fail: flash:aboot
FAILED (remote failure)
finished. total time: 0.319s
C:\adb>fastboot flash logo logo.bin
target reported max download size of 536870912 bytes
sending 'logo' (1848 KB)...
OKAY [ 0.094s]
writing 'logo'...
OKAY [ 0.078s]
finished. total time: 0.172s
C:\adb>fastboot flash boot boot.img
target reported max download size of 536870912 bytes
sending 'boot' (16384 KB)...
OKAY [ 0.687s]
writing 'boot'...
(bootloader) Image boot failed validation
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.891s
C:\adb>fastboot flash recovery recovery.img
target reported max download size of 536870912 bytes
sending 'recovery' (16484 KB)...
OKAY [ 0.664s]
writing 'recovery'...
(bootloader) Image recovery failed validation
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.883s
C:\adb>fastboot flash system system.img_sparsechunk.0
target reported max download size of 536870912 bytes
sending 'system' (257278 KB)...
OKAY [ 9.982s]
writing 'system'...
(bootloader) Image s failed validation
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 10.097s
C:\adb>fastboot flash system system.img_sparsechunk.1
target reported max download size of 536870912 bytes
sending 'system' (258607 KB)...
OKAY [ 10.125s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 10.157s
C:\adb>fastboot flash system system.img_sparsechunk.2
target reported max download size of 536870912 bytes
sending 'system' (258384 KB)...
OKAY [ 10.076s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 10.107s
C:\adb>fastboot flash system system.img_sparsechunk.3
target reported max download size of 536870912 bytes
sending 'system' (252313 KB)...
OKAY [ 9.973s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 10.004s
C:\adb>fastboot flash system system.img_sparsechunk.4
target reported max download size of 536870912 bytes
sending 'system' (254404 KB)...
OKAY [ 10.017s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 10.064s
C:\adb>fastboot flash system system.img_sparsechunk.5
target reported max download size of 536870912 bytes
sending 'system' (258060 KB)...
OKAY [ 10.114s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 10.161s
C:\adb>fastboot flash modem NON-HLOS.bin
target reported max download size of 536870912 bytes
sending 'modem' (76857 KB)...
OKAY [ 3.038s]
writing 'modem'...
OKAY [ 2.036s]
finished. total time: 5.075s
C:\adb>fastboot erase modemst1
erasing 'modemst1'...
OKAY [ 0.047s]
finished. total time: 0.047s
C:\adb>fastboot erase modemst2
erasing 'modemst2'...
OKAY [ 0.062s]
finished. total time: 0.062s
C:\adb>fastboot flash fsg fsg.mbn
target reported max download size of 536870912 bytes
sending 'fsg' (1864 KB)...
OKAY [ 0.100s]
writing 'fsg'...
OKAY [ 0.109s]
finished. total time: 0.210s
C:\adb>fastboot erase cache
erasing 'cache'...
OKAY [ 0.016s]
finished. total time: 0.031s
C:\adb>fastboot erase userdata
erasing 'userdata'...
OKAY [ 0.078s]
finished. total time: 0.078s
C:\adb>fastboot erase customize
erasing 'customize'...
OKAY [ 0.031s]
finished. total time: 0.031s
C:\adb>fastboot erase clogo
erasing 'clogo'...
OKAY [ 0.047s]
finished. total time: 0.047s
C:\adb>fastboot oem fb_mode_clear
...
OKAY [ -0.000s]
finished. total time: -0.000s
C:\adb>fastboot reboot
rebooting...
finished. total time: 0.016s
Click to expand...
Click to collapse

Phatzy said:
Hi There,
I hope someone can advise and possibly provide help resolving this problem.
The Moto G4 XT1622 is not able to boot to OS, It only boots into bootloader, cannot go into recovery and cannot go into Factory Mode etc.
The error i get on the phone is....
"Start Up Failed"
Failed to verify hab image boot
Failed to verify boot image
ERROR: Failed to pass validation, backup to fastboot
Fastboot Reason: Fall-through from normal boot mode
I have tried to clear fb_mode and tried to unlock the bootloader without success.
I have tried various stock roms to get this fixed. The phone has never been unlocked and not been rooted.
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It looks to me like you're trying to flash a firmware that is a downgrade from what was already on the device. It's probably blocking you because it won't allow a downgrade. Flash the version that the device already had on it or flash a newer version.
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I throught that would be the case but i have tried the 4 roms available for this device and even the 7.0 OTA rom but nothing if able to flash. I cannot even unlock the bootloader.
Thanks

Phatzy said:
I throught that would be the case but i have tried the 4 roms available for this device and even the 7.0 OTA rom but nothing if able to flash. I cannot even unlock the bootloader.
Thanks
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You may have to faatboot flash the individual .img(boot, system, cache, recovery, etc..) files by themselves.
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Yeah I tried that too. I just get the same errors as this.....
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.094s
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Phatzy said:
Yeah I tried that too. I just get the same errors as this.....
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Do you have USB debugging enabled?
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Hi,
I dont think so as I cannot check due to the phone not able to get pass bootloader. I tried to use the fb_mode command but still goes back to bootloader saying filed to start.
Thanks..
Droidriven said:
Do you have USB debugging enabled?
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