Database Users

[Q] Help please!!! LG G2 F320L doesn't boot. Boot certification verify.

LG G2 F320L fails to boot after android update.
Device was not rooted.
Just from store.
-
After update of software, when device is started i get (picture in attachment):
Boot certification verify
Secure booting Error!
Cause: boot certification verify
-----
Tried to enter recovery mode (power + Volume down) - didn't
work.
Found out that pressing (power + Volume up and down) makes phone enter
some mode where everything is on korean (picture in attachment). After trying
pressing different buttons it didn't help also.
I tried "LG G2 Stock Firmware (Go Back to Stock)"
http://forum.xda-developers.com/showthread.php?t=2432476
but i couldn't enter download mode.
Then i tried "LG G2 F320K deep&hard brick! REPAIRED now."
http://forum.xda-developers.com/showthread.php?t=2476972
+
"[Guide]HOW TO get back to stock when your phone stuck in fastboot
mode" http://forum.xda-developers.com/showthread.php?t=2477595
but my phone doesn't enter fastboot mode!
I am out of ideas. Any help will be appreciated!!!

same issue here...and i can't get into download mode anymore...always boots in recovery and that's it. any idea what to do now????
PLEASE HELP..i go nuts!
btw....mine is rooted with customrom and twrp. so no warranty. ...so please !!!
as i have access to my twrp installation...is there a way to copy stuff to the internal storage of the g2 or can i connect a usb stick via dongle that i can mount in TWRP? ...so i can try to reinstall stuff?

upage said:
same issue here...and i can't get into download mode anymore...always boots in recovery and that's it. any idea what to do now????
PLEASE HELP..i go nuts!
btw....mine is rooted with customrom and twrp. so no warranty. ...so please !!!
as i have access to my twrp installation...is there a way to copy stuff to the internal storage of the g2 or can i connect a usb stick via dongle that i can mount in TWRP? ...so i can try to reinstall stuff?
Click to expand...
Click to collapse
Adb push
Sent from my ZTE Blade using XDA Premium 4 mobile app

Hey all! I've been fighting with similar errors for a couple days and I figured out what happened. I was stuck in fastboot mode the first time due to installing the d802 Cyanogen mod on my d800 AT&T phone on accident (wiki threw me off...) and the second time I attempted to flash a boot.img that was close but not quite right for my phone, causing the boot verify fail issue.
In the first case, my phone eventually went dead and I was able to enter download mode by holding volume up and plugging in the cable while it was still dead. In the second, I found that holding all buttons (volume up, down, and power) continuously eventually made it shut off completely. BUT you have to KEEP holding it, even after it reboots!! Once I got to that stage, the LG Flash software worked wonderfully. Once you get it reset, double and triple check you have the right rom file, then check a few more times just to make sure. Hope that helps!

sergeydavidoff said:
LG G2 F320L fails to boot after android update.
Device was not rooted.
Just from store.
-
After update of software, when device is started i get (picture in attachment):
Boot certification verify
Secure booting Error!
Cause: boot certification verify
-----
Tried to enter recovery mode (power + Volume down) - didn't
work.
Found out that pressing (power + Volume up and down) makes phone enter
some mode where everything is on korean (picture in attachment). After trying
pressing different buttons it didn't help also.
I tried "LG G2 Stock Firmware (Go Back to Stock)"
http://forum.xda-developers.com/showthread.php?t=2432476
but i couldn't enter download mode.
Then i tried "LG G2 F320K deep&hard brick! REPAIRED now."
http://forum.xda-developers.com/showthread.php?t=2476972
+
"[Guide]HOW TO get back to stock when your phone stuck in fastboot
mode" http://forum.xda-developers.com/showthread.php?t=2477595
but my phone doesn't enter fastboot mode!
I am out of ideas. Any help will be appreciated!!!
Click to expand...
Click to collapse
I had the same problem. here is theonly way to fix your problem http://forum.xda-developers.com/showthread.php?t=2582142

Partager.info said:
I had the same problem. here is theonly way to fix your problem http://forum.xda-developers.com/showthread.php?t=2582142
Click to expand...
Click to collapse
I probably souldn't have done that...
Code:
ERROR : BOOT certification verify
[830]-----------------------------------
[880]
[930]Secure booting Error!
[1030]
[1080]----------------------------------
That's the error message I get when I boot, this is after I hold the power down button for about 10sec. Then it goes back to black.
The solution seems to be here: http://forum.xda-developers.com/showthread.php?t=2582142 . Problem is that I used a kdz file to install my ROM and it doesn't have any img files.
When I connect my phone to my pc, a whole lot of local disks pop-up, of which I can acces only 1. This one has a lot of adsp.b00, adsp.b01, adsp.b02, etc files in it together with some other bXX (where XX is 01 to 26) files.

i haD usbhq_bulK and many drives all i had to do was flash tot.with flash tools if your doesnt go into download mode.. use srk toold to nuke download mode if it fails then open phone and short circuit the motherboard..
http://forum.xda-developers.com/lg-g2/general/lg-g2-unbrickable-fix-real-hard-brick-t2904404

[Q] LG G2 stuck in fastboot mode started!

Hello all! So recently i decided to try and install a custom recovery, autodec or something and when i boot into recovery all it says is:
[860]fastboot mode started
[910]udc_start()
(if i plug it into my PC it adds)
[1070]-reset-
[1080]-portchange-
[1150] fastbootrocessing commands
Note:numbers change at times
i have tried A LOT of methods but it never works, so its either me that did the method wrong or that it doesn't work at all.
I CANNOT get into recovery mode at ALL
I CANNOT go into download mode, it just switches back into the fast boot mode started...
i cant factory hard reset, all it does is take me back into the fast boot thingy.
so basically everything takes me back to the fast boot thing.
PLZ HALP XD <3
EDIT: Also when i try cmd it says device is not ready?

LGG2 XD HALP said:
Hello all! So recently i decided to try and install a custom recovery, autodec or something and when i boot into recovery all it says is:
[860]fastboot mode started
[910]udc_start()
(if i plug it into my PC it adds)
[1070]-reset-
[1080]-portchange-
[1150] fastbootrocessing commands
Note:numbers change at times
i have tried A LOT of methods but it never works, so its either me that did the method wrong or that it doesn't work at all.
I CANNOT get into recovery mode at ALL
I CANNOT go into download mode, it just switches back into the fast boot mode started...
i cant factory hard reset, all it does is take me back into the fast boot thingy.
so basically everything takes me back to the fast boot thing.
PLZ HALP XD <3
EDIT: Also when i try cmd it says device is not ready?
Click to expand...
Click to collapse
same problem here..stucked..i find this http://forum.xda-developers.com/showthread.php?t=2477595 ..now i'm trying to do something
That tutorial doesnt worked for me because my pc didnt recognize my phone...but i was able to enter in download mode.. plug in your usb, press the power button to turn off your phone, and hold the volume up button and it will need to enter in download mode..this worked for me

raulx222 said:
same problem here..stucked..i find this http://forum.xda-developers.com/showthread.php?t=2477595 ..now i'm trying to do something
That tutorial doesnt worked for me because my pc didnt recognize my phone...but i was able to enter in download mode.. plug in your usb, press the power button to turn off your phone, and hold the volume up button and it will need to enter in download mode..this worked for me
Click to expand...
Click to collapse
ty m8 but i fixed my phone XD

Zuk Z1 Soft Brick

Dear XDA friends,
i always hoped not to be one of those guys, who f****d up their phones to the point of no return. I really screwed up this time. Well, here I'am writing you about my screw up.
I unlocked, rooted, flashed and repaired all kinds of android phones in the past years, never without problems, but I could always fix it somehow. Not so much this time.
Now I'm stuck at Bootscreen with the Zuk logo. I even have problems pinging the phone via ADB.
Sorry for my noobish question guys. Any help would be much appreciated.

triby said:
Dear XDA friends,
i always hoped not to be one of those guys, who f****d up their phones to the point of no return. I really screwed up this time. Well, here I'am writing you about my screw up.
I unlocked, rooted, flashed and repaired all kinds of android phones in the past years, never without problems, but I could always fix it somehow. Not so much this time.
Now I'm stuck at Bootscreen with the Zuk logo. I even have problems pinging the phone via ADB.
Sorry for my noobish question guys. Any help would be much appreciated.
Click to expand...
Click to collapse
I got this translated from a chinese website:
For fastboot mode:
The phone turned off; keep the connection turned off the data cable to the computer, press: [volume down key] [Power Key] waiting to enter the fastboot mode.
For recovery:
Turn off the device
Press and hold Power key
When vibrates Volume UP key + Volume Down key about 10 seconds
Release all key when Android logo appear then you will see Android System Recovery
Use Volume key to select Menu
Use Power key to Confirm
Can you enter any of these 2 modes?

Life Engineer said:
I got this translated from a chinese website:
For fastboot mode:
The phone turned off; keep the connection turned off the data cable to the computer, press: [volume down key] [Power Key] waiting to enter the fastboot mode.
For recovery:
Turn off the device
Press and hold Power key
When vibrates Volume UP key + Volume Down key about 10 seconds
Release all key when Android logo appear then you will see Android System Recovery
Use Volume key to select Menu
Use Power key to Confirm
Can you enter any of these 2 modes?
Click to expand...
Click to collapse
thank you life engineer! No luck . I'll try to send it back. Thanks again for you're help. Much appreciated!

hi xda, i am facing thesame problem with my lenovo zuk z1 phone. its on a bootloop. i can enter the recovery by pressing both up and down vol. keys, i have wiped data/factory reset and wiped cache partition and rebooted but it doesnt fix.. I tried to reboot to bootloader but is stuck on fastboot mode screen. ive tried to search a solution but none have helped. The connection between phone via usb to computer only lasts like 2 secs. during boot then it disconnects again beacuse of the bootloop. Can anyone pls. help.

rusty96379 said:
hi xda, i am facing thesame problem with my lenovo zuk z1 phone. its on a bootloop. i can enter the recovery by pressing both up and down vol. keys, i have wiped data/factory reset and wiped cache partition and rebooted but it doesnt fix.. I tried to reboot to bootloader but is stuck on fastboot mode screen. ive tried to search a solution but none have helped. The connection between phone via usb to computer only lasts like 2 secs. during boot then it disconnects again beacuse of the bootloop. Can anyone pls. help.
Click to expand...
Click to collapse
How does the bootloop look like?

crian said:
How does the bootloop look like?
Click to expand...
Click to collapse
The bootloop is just showing the ''ZUK logo'' in the middle of screen and "'powered by Android logo'' below,and the phone vibrates everytime it flashes these logos. I tried QFIL but it can only detects the unit on the first boot or first flash that is 2 secs. only from the time i press the power button, and then it disconnects and not detect the unit again. Does anyone know where can i find the scatter file , MTK ROM for zuk z1, i would like to try the SP flasher tool. Or if anyone have any idea how to solve this issue on lenovo zuk z1,pls. help.tnx

Can y get to fastboot ?

im facing the same problem after i had the stupid idea to lock the bootloader again, before that i flashed the phone successfully with the cm mod recovery and cm 13.
Has anyone found a solution to this ? or do i have to send it back ?
What i did exactly :
I locked the bootloader again and just to test it i tried flashing the recovery again , ofcourse it didn't work which was what i wanted.
Afterwards i rebootet the bootloader with sudo fastboot -i 0x2b4c reboot
now im stuck in a bootloop that i cant even stop , in other words i cant turn my phone off nor can i access the recovery or fastboot
Im feeling so stupid that i locked it again .... i will try to get into recovery after my phone ran out of battery but so far it looks quite bad...does anyone know if i will get a replacement even though it was my fault ? ( i don't need to say that it was my fault ..and the bootloader is now locked again )
UPDATE::
I found a promising thread about this problem, i will report back here if i was successful.
-> forum.cyanogenmod.org/topic/121913-after-nighty-update-to-20160212-the-zuk-is-bricked-without-salvation/

CPP11 said:
UPDATE::
I found a promising thread about this problem, i will report back here if i was successful.
-> forum.cyanogenmod.org/topic/121913-after-nighty-update-to-20160212-the-zuk-is-bricked-without-salvation/
Click to expand...
Click to collapse
pressing Vol + & Vol - the connecting the USB cable entered bootloader mode. YEAH!!!!

Need some help
And after that what to do I can get it to recovery and the fastboot mod but after that what to do my phone like this for a month now

Any solution?!
did you solve it i have exactly the same problem for a month now as well (Exactly same situation) Please help
---------- Post added at 01:20 AM ---------- Previous post was at 01:08 AM ----------
Amen Ghazy said:
And after that what to do I can get it to recovery and the fastboot mod but after that what to do my phone like this for a month now
Click to expand...
Click to collapse
did you solve it i have exactly the same problem for a month now as well (Exactly same situation) Please help

Please help , same problem
I am facing same issue too from 2 days. I didnt even try to flash custom roms or play with boot loader or recovery or anything. All of a sudden my phone entered boot loop. After two three bootloops phone is entering "12 apps optimized of 230 apps" mode, completing optimizing all apps and then failing to start apps, entering boot loop again.
Effort made so far to fix -
1) Went to recovery and cleared cache - didnt work
2) Went to recovery and did factory reset - factory reset did happen but boot loop didnt stop, I realized that factory reset happened because now its saying optimizing 120 apps instead of my 230 apps during the bootloop.
3) Went to recovery, Entered fast boot mode but not able to connect to PC. Fastboot devices is not showing anything. I made sure proper driver is installed after researching on XDA.
4) Went to recovery, Tried "Install update". Didnt install anything but browsed through folder structure and realized my data is intact
It will be great if someone can help me atleast recover my data before I handover phone to service center for fixing boot loop issue.

Same problem
crian said:
How does the bootloop look like?
Click to expand...
Click to collapse
i have same problwm what to do plz help mme

Abhishekjain31291 said:
i have same problwm what to do plz help mme
Click to expand...
Click to collapse
Explain in detail

errecez1 said:
pressing Vol + & Vol - the connecting the USB cable entered bootloader mode. YEAH!!!!
Click to expand...
Click to collapse
The link is not accessible now. Can you let me know what you have done. My phone is in a boot loop now and showing only Logo and 'powered by Android' message. It keeps turning on and off again and again.

Guys when u are in fast boot mode .. pls install Twrp ... After insatlling that press power button abd vibration comes hold volum doen+volume up button at the same time ..
Then u will be getting recovery Twrp mode .. then connect it to pc and u will see internal srorage in pc...now u have to copy any rom to the phone and install it via Twrp ... Thats all

Sorry For Re-posting Here. This is Solution
Why this is happening ?
Due to Dirty Flash from Zui or from COS/CMOD but suddenly Bootloader gets locked
May be Due to Some Custom Rom which only works with Old Bootloader ( And you are on latest 2.5 Zui QPST Flash)
Reasons are many. I also did same mistake. I flashed ZUI 2.5 using QPST then unlock bootloader using official site installed twrp after wiping cache system and data , Installed Lineage 0S JAN Build then without rebooting installed Lineage Nightly build (Latest) with Gapps After rebooting Phone goes into Restart endless loop on ZUK Logo. Blink and Vibrate .. After 1hr I figured it out but its 5am So slept.
HOW TO FIX ENDLESS REBOOT ON ZUK Logo ?
-> Identity vibrate patterns (Press Power Key I count 6- 7 Vibration pattern ) After long Vibrate immediately remove finger from power key.
->Once its Done (Phone completely off)
Download QPST and Official COS QPST from this Link https://goo.gl/InWQji OR https://goo.gl/iqrnlI (I am personally Very Thankful to D tech Terminal for posting Wonderful video on Youtube https://www.youtube.com/watch?v=4Dl6JkAVpuM
<- please install all drivers and software.->) @ankurpandeyvns Thanks bro.
Main Task is here and Lots of Patience is required and You also need to be very Blazing fast to achieve this.
-Once you download and install Qpst open Qfil
-Now press Volume Up only and connect USB (Just press POWER KEY only for 1 sec It will vibrate and connect)
-Without waiting hit Download button.
-Voila It will start flashing your phone again and Hence Your phone is now Revive..
-Once Revive You can use it to again flash custom Rom or stick to stock Rom if you want.
Keep Flashing !!!
Patience is Key here. And Don't lose hope.
:good:
EDITED:
While connecting to pc and by pressing Volume key you also need to press Power key for 1 sec or 2 sec until it gets detected. Thanks addicted777 (for tip)

rajendra0072 said:
Sorry For Re-posting Here. This is Solution
Why this is happening ?
Due to Dirty Flash from Zui or from COS/CMOD but suddenly Bootloader gets locked
May be Due to Some Custom Rom which only works with Old Bootloader ( And you are on latest 2.5 Zui QPST Flash)
Reasons are many. I also did same mistake. I flashed ZUI 2.5 using QPST then unlock bootloader using official site installed twrp after wiping cache system and data , Installed Lineage 0S JAN Build then without rebooting installed Lineage Nightly build (Latest) with Gapps After rebooting Phone goes into Restart endless loop on ZUK Logo. Blink and Vibrate .. After 1hr I figured it out but its 5am So slept.
HOW TO FIX ENDLESS REBOOT ON ZUK Logo ?
-> Identity vibrate patterns (Press Power Key I count 6- 7 Vibration pattern ) After long Vibrate immediately remove finger from power key.
->Once its Done (Phone completely off)
Download QPST and Official COS QPST from this Link https://goo.gl/InWQji OR https://goo.gl/iqrnlI (I am personally Very Thankful to D tech Terminal for posting Wonderful video on Youtube https://www.youtube.com/watch?v=4Dl6JkAVpuM
<- please install all drivers and software.->) @ankurpandeyvns Thanks bro.
Main Task is here and Lots of Patience is required and You also need to be very Blazing fast to achieve this.
-Once you download and install Qpst open Qfil
-Now press Volume Up only and connect USB (Just press only for 1 sec It will vibrate and connect)
-Without waiting hit Download button.
-Voila It will start flashing your phone again and Hence Your phone is now Revive..
-Once Revive You can use it to again flash custom Rom or stick to stock Rom if you want.
Keep Flashing !!!
Patience is Key here. And Don't lose hope.
:good:
Click to expand...
Click to collapse
I'm happy that my videos were helpful. Enjoy.

keeps vibrating showing logo again and again, neither won't turn off neither turn on till for so many hour until the charge is empty....

how to stop boot loop ??????
can you provide videos how to stop boot loop ??????

ZUK stuck on boot screen logo , pressing volumme keys + power button no use !

i just wanted my zuk phone to get back to the stock rom ,...i tried http://forum.xda-developers.com/zuk-...ofrio-t3332563 Tool to flash stock rom ,.. the rom installed succesfully but when i tried to reboot my phone ,..i ended up with zuk boot logo ,..even i cant access fastboot by vol + pwer .....any solutions !

If there is no access to fastboot, the QPST rom files and QFIL tools is the only go for you now. Search the forums, there is a lot of information on this tool.

siva prakash said:
i just wanted my zuk phone to get back to the stock rom ,...i tried http://forum.xda-developers.com/zuk-...ofrio-t3332563 Tool to flash stock rom ,.. the rom installed succesfully but when i tried to reboot my phone ,..i ended up with zuk boot logo ,..even i cant access fastboot by vol + pwer .....any solutions !
Click to expand...
Click to collapse
I brick my zuk the first day . wait to battery out and screen off now press vol+ vol - and connect to the wallcharger any seconds disconect and use QFil see tutorials on the web , vol+ and connect and you can enter to fastbot and flash stock rom .

xdddd23 said:
I brick my zuk the first day . wait to battery out and screen off now press vol+ vol - and connect to the wallcharger any seconds disconect and use QFil see tutorials on the web , vol+ and connect and you can enter to fastbot and flash stock rom .
Click to expand...
Click to collapse
Hey mate no need , i managd to power off my mobile some how ,..now i can force my phone into fast boot directly by pressing vol up +down at same ,..now my mobile is completely stock and i can receive and update OTA

siva prakash said:
Hey mate no need , i managd to power off my mobile some how ,..now i can force my phone into fast boot directly by pressing vol up +down at same ,..now my mobile is completely stock and i can receive and update OTA
Click to expand...
Click to collapse
Hey,
I used a tool to get my phone back to stock, as i had bricked it in the past.
now i get the zuk logo when i turn the phone on and its stuck at that. nothing happens when i press vol up or down or anything.
any help please?

Flashed wrong image. ZUK Z1 is bricked.

Hello everybody.
Clumsy idiot I am, I flashed the wrong .img through Flashify and now my phone is bricked. Here's all I know:
All I see is a boot loop, phone turns on (with bootleg and vibration) for a second, then off, on again and so on.
- TWRP installed, but not reachable.
- ADB not working.
- QFIL not recognising the phone (drivers installed).
- I have no logs to post.
- No way to operate Volume/Power combinations because the time the phone reboots is less than a second.
What can I do to save it?

Take it to service center they dont even know what happan and repair or replace your phone as my expiriance same done on my old infocus m2

Keep pressing volume up + volume down and power button so u can enter twrp...
Or
Switch it off completely and press volume up and connect it to pc to enter fastboor and flash stock rom using fastboot...
I think u can revive ur phone back as its booting means the bootloader is still present...try entering fastboot
Sent from my ZUK Z1 using Tapatalk

Use QPST and flash ZUI with that. I unbricked mine with that.

Kounjula Rahul said:
Keep pressing volume up + volume down and power button so u can enter twrp...
Or
Switch it off completely and press volume up and connect it to pc to enter fastboor and flash stock rom using fastboot...
I think u can revive ur phone back as its booting means the bootloader is still present...try entering fastboot
Sent from my ZUK Z1 using Tapatalk
Click to expand...
Click to collapse
All kinds of physical inputs and button combinations fail.
YoolaCro said:
Use QPST and flash ZUI with that. I unbricked mine with that.
Click to expand...
Click to collapse
QPST does not recognise the phone. Drivers installed and all set up al right, sadly.

Do as i say

i also did same mistake
tried to install twrp with flashify ...my phone too keeps on restarting every second..please help me guys..
if you got any solution to this means please help me

Did you solve the problem? Mine is having the same problem!

Please Help Me.....!!
SarthakSL said:
Did you solve the problem? Mine is having the same problem!
Click to expand...
Click to collapse
Did anyone find solution of it?
Because I accidently flashed one plus 1 twrp in zuk z1. Now device only shows zuk logo and after that complete black out. I also tried the solution of hardbricked( Volume up button) phone but can't fix this problem. I am not able to go to fastboot mode. Is my device is hardbricked or softbricked? Any one suggestion will be very helpful to me and thanks in advance.
---------- Post added at 06:48 PM ---------- Previous post was at 06:18 PM ----------
Giop114 said:
Hello everybody.
Clumsy idiot I am, I flashed the wrong .img through Flashify and now my phone is bricked. Here's all I know:
All I see is a boot loop, phone turns on (with bootleg and vibration) for a second, then off, on again and so on.
- TWRP installed, but not reachable.
- ADB not working.
- QFIL not recognising the phone (drivers installed).
- I have no logs to post.
- No way to operate Volume/Power combinations because the time the phone reboots is less than a second.
What can I do to save it?
Click to expand...
Click to collapse
You found solution?
if found please please give me

It seems there is a solution. Keep pressing the Vol+ Vol- and the Power Button until the phone switches off. The phone will reboot. This time when you press Power Button, it will not restart. Hope I helped you.

Refer this
https://forum.xda-developers.com/zuk-z1/general/qpst-method-how-to-unbrick-to-stock-t3506833