Develop Bugs

[Q] Optimus G Reboots

Hello everybody
I have a problem with my phone, today I installed a game, Plants vs Zombies 2, and after a few minutes I was playing the phone has rebooted. Since that time at start up, after 15/20 seconds the phone reboots again.
I tried to do a hard reset but I have not solved anything.
A couple of days ago I flashed the firmware France "H", so I tried to flash an Italian firmware and I redid the hard reset but it has not solved anyway. (Now I have an "unknow IMEI")
I'm trying to do a restore with LG support tool, but the battery was too low then try again later.
*EDIT*
LG support tool has restored the original firmware (brand vodafone), but still no imei and reboots
Any other tips? Could you help me please
thaks!

Do you have freegee backup folder saved if you ever used it to unlock boot loader.
If yes restore it. Seems you have messed up efs.
Sent from my LG-E975 using Tapatalk

atifsh said:
Do you have freegee backup folder saved if you ever used it to unlock boot loader.
If yes restore it. Seems you have messed up efs.
Sent from my LG-E975 using Tapatalk
Click to expand...
Click to collapse
i did a backup with freegee but i have done 2 hard reset so i think i have deleted it
How can i restore efs?

i have the same problem. I took him to the warranty and they could not fix it. because I do not put a warranty they cant do anything for me

koquipr said:
i have the same problem. I took him to the warranty and they could not fix it. because I do not put a warranty they cant do anything for me
Click to expand...
Click to collapse
lg can not even solve the problem? then the phone is dead?

Hi,
if is not possible to restore the emei without a backup, is it possible to recover data from the storage if the smartphone is in download mode or recovery mode? I did a backup but i did 2\3 hard resets.

cosworth1988 said:
Hi,
if is not possible to restore the emei without a backup, is it possible to recover data from the storage if the smartphone is in download mode or recovery mode? I did a backup but i did 2\3 hard resets.
Click to expand...
Click to collapse
hardreset means complete factory reset and al ur data frm the internal storage will be deleted..!!...wrong choice

I do not understand why the phone reboots (and after i flashed the 10h firmware the phone worked fine for 2 days).
Without imei phone should not make calls.
I can not even flash another firmware because in the process the phone reboots and after a few seconds and the phone will reboot again before the process is finished

exactly the problem i have right now , sent it to over 4 shops , all couldn't fix it , said i had to send it back to lg to fix it , but lg is asking me for 300$ to fix it ( , im phoneless atm.

It seems is mainboard issue.hardware problems can't be fixed by software solutions....

cosworth1988 said:
I do not understand why the phone reboots (and after i flashed the 10h firmware the phone worked fine for 2 days).
Without imei phone should not make calls.
I can not even flash another firmware because in the process the phone reboots and after a few seconds and the phone will reboot again before the process is finished
Click to expand...
Click to collapse
kimitza said:
It seems is mainboard issue.hardware problems can't be fixed by software solutions....
Click to expand...
Click to collapse
well then after the reboot sequence for a couple of days , i flashed another firmware 10e or something and it started working again for 2 days but it went back to the reboot sequence like in the beginning... i don't really think it's a hardware issue , when im charging it in the off position , it just works normally.

zenalc said:
well then after the reboot sequence for a couple of days , i flashed another firmware 10e or something and it started working again for 2 days but it went back to the reboot sequence like in the beginning... i don't really think it's a hardware issue , when im charging it in the off position , it just works normally.
Click to expand...
Click to collapse
if I turn on the phone in download mode it does not reboot, I think it's an efs issue or something like that, I hope they will solve the problem under warranty...

cosworth1988 said:
if I turn on the phone in download mode it does not reboot, I think it's an efs issue or something like that, I hope they will solve the problem under warranty...
Click to expand...
Click to collapse
yes its an efs issue , or something software related but not hardware related....

any luck? have you found a solution by flashing something? or did you just take it to the lg store? btw where can i download the android 4.0.4 software kdz? thanks

Weirdest brick ever

So I have an H815 and I was running the 7HD custom rom. I never had problems with my G4 until yesterday. I was at work and I got on the facebook app, then the phone froze. It then powered down and I got stuck in an infinite bootloop. I flashed a stock KDZ and still nothing. The phone turns on and is able to fully get into download mode. It does not do anything, it gets interrupted doing whatever it is doing and just powers of randomly and reboots. It rarely gets into the Android OS. I have done a regular flash and an emergency flash and still no luck. It's safe to say all my files are erased. And now it looks like I finally have a paperweight. Any help would be nice.

This happened to me on my H811. I suspected a storage failure in my case, as I couldn't do anything to help the phone, and it would always get to some point of loading before quitting on me.
Sent from my LG-H811 using Tapatalk

that sucks...
and with LG warranty removal good luck for telling them that this happens DURING normal usage and not during flash or something else

That happened to me on another phone. The problem was the eMMC (Flash Memory) died.

I was able to get a warranty replacement quite quickly by contacting the T-Mobile T-Force on Facebook. I'd recommend doing the same so you can have a fresh device in about 2 days.

This is the international version though. I do have T-Mobile service, but I dont know if they would replace a phone that I never bought from them in the first place. I might just have to get a new one.

I'm guessing it's the flash storage that died on my H815T (after flashing a backup I made of the system partition). I hope this doesn't indicate a problem with the durability of the G4's internal storage.

I bricked my rooted g4 and lg fixed it with a brand new phone no questions asked. Got lucky ?
Sent from my LG-H812 using XDA Premium HD app

How would I reach them? I remember I tried to ge a warranty replacement but I never got a reply..How did you do it?

ROOTED VZ G4 Bootloop - Will this break my warranty?

XDA,
I just got into a bootloop while on the Facebook App and I pressed the home button. I read that it happens to random people, but I want to make sure that I am safe.
I rooted roughly 5 months ago, when I got this phone and I've never had an issue.
What are my options? If I call VZ/LG will they accept my rooted phone? Or can I fix this bootloop? Will using this method http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848 help me ?
Thank you,
-J
EDIT: My phone booted up, the apps were optimizing, but then it just rebooted back to the LG screen and now it's stuck there.

[removed by dentralp]

dentralp said:
Don't want to do fear mongering just keep people in the know...
If you are stuck on LG screen you could have the same issue as;
http://forum.xda-developers.com/g4/help/lg-g4-stuck-bootloop-t3268734
I had full bootloops apart from when MM was installed, it just sat there on the LG logo. Could be that your on MM with the issue?
I have tried LG Bridge, Flash Tool and LG Up with various different roms, both LP and MM nothing worked.
Mine is also Rooted, with the bootloader unlocked. LG UK have been sat with my phone for over a month - hopefully I will find out soon if they have fixed it using the warranty - but even if they do, mine is with LGUK not LGUS ...
Think what I am trying to say is, try all the methods and if it doesnt work send it for RMA with your fingers crossed :/
Click to expand...
Click to collapse
Just so I understand you, I basically have to RMA my phone? All the other options seem like they resulted in a bootloop. And RMA I'm assuming you mean using warranty?
And I'm not on MM.
Just out of curiosity, would the fact that I rooted my phone disqualify me for using mywarranty?

I guess you rooted with injected system.img. If you can go to download mode you could write the original system.img back, so then you are not rooted. Or you could write a KDZ file in LGUP.

ObiDanKenobi said:
I guess you rooted with injected system.img. If you can go to download mode you could write the original system.img back, so then you are not rooted. Or you could write a KDZ file in LGUP.
Click to expand...
Click to collapse
As far as I'm aware, simply restoring an original unrooted system.img backup will still show "Modified" in the download mode status, once it's been rooted. The only way to clear that status is by flashing the KDZ. (You can still keep your personal data with that option though.)

iamjerry123 said:
XDA,
I just got into a bootloop while on the Facebook App and I pressed the home button. I read that it happens to random people, but I want to make sure that I am safe.
I rooted roughly 5 months ago, when I got this phone and I've never had an issue.
What are my options? If I call VZ/LG will they accept my rooted phone? Or can I fix this bootloop? Will using this method http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848 help me ?
Thank you,
-J
EDIT: My phone booted up, the apps were optimizing, but then it just rebooted back to the LG screen and now it's stuck there.
Click to expand...
Click to collapse
Based on what I've read in the main bootloop thread, the bootloop issue is a hardware problem that requires the phone motherboard to be replaced so I don't think they will be able to detect the root during the RMA process:
...
I have received confirmation from LG that series from May, June, July and August are afflicted by this issue and that the revision number doesn't matter. They also said that it is not necessary that all phones in these series will fail, but that under certain circumstances (not disclosed to me) they will start producing the bootloop issue which is h/w bound.
...
Update: It seems not all bootloops are due to deffective motherboard as on some phones they were able to detect the root and refused the repair under warranty.
So maybe for some G4's stuck in bootloop there might be a solution to be soft repaired.
I saw this in another thread, can you try this?:
...
Using DL mode (device off -> press and hold volume up while(!) connecting to PC) and LGUP you should be able to push any KDZ on your device and get out of the boot loop.
...
I don't have the bootloop problem so I can't test it but it might.
What's the build date of your G4 (between May-August 2015?)? What are the 1st 3 digits of your phone's S/N?

If you root any phone you automatically void your warranty. There's no exception to this and I actually understand why they do that because most people don't need to be rooting their phones lol but if u find a KDZ you're str8, use the flashtool and you'll never get into a permanent bootloop and you can use your warranty. But most likely something you modified or something another app was doing caused the bootloop not a hardware issue. Also it'd probably the last thing you ever even thought that caused it lol
Sent from my VS986 using Tapatalk

Have you tried a hard factory reset? Usually helps

LG G4 stuck in bootloop and won't flash

hello everybody
recently my H818p G4 , just got in a bootloop out of the blue , I tried all these safe mode , hard reset , .. nth works always freezes at one moment so I decided to reflash a KDZ
the thing is , the phone sometimes gets in download mode and sometimes it doesn't just like there is no battery inserted won't even boot with battery in and fully charged
the times when it gets into download mode it starts flashing and then it just reboot and stuck in LG logo in the middle of flashing process.
I used both LG flashtool and LGup softwares .. and same problem every single time
any fixes to this ?

Your phone has developed bootloop issue just like hundreds of us here (thus there is no need for another thread) so you have 2 options though ultimately it will be still repair job for LG if it is under warranty:
1) Temporary solution to disable big cores and try to recover the data if it is of any importance and you can have phone working for some time but it will be slow:
http://forum.xda-developers.com/showpost.php?p=67550617&postcount=1273
2) RMA your device to LG to have motherboard replaced
http://forum.xda-developers.com/g4/help/lg-g4-stuck-bootloop-t3268734

gedas5 said:
Your phone has developed bootloop issue just like hundreds of us here (thus there is no need for another thread) so you have 2 options though ultimately it will be still repair job for LG if it is under warranty:
1) Temporary solution to disable big cores and try to recover the data if it is of any importance and you can have phone working for some time but it will be slow:
http://forum.xda-developers.com/showpost.php?p=67550617&postcount=1273
2) RMA your device to LG to have motherboard replaced
http://forum.xda-developers.com/g4/help/lg-g4-stuck-bootloop-t3268734
Click to expand...
Click to collapse
but the link u gave me , talks abt H815 mine is H818p .. would it work still ?

update
I successfully flashed it using LGup software .. all went aright , 100% ... phone reboots then comes that green android robot , then comes LG logo for a while and then everything goes black , like phone totally shutdown

Of course it won't work as per my post above. Hundreds of posts on this so not sure why there is a need for you to be different and create new thread? Is the search button not working?
Everything you need to know is here: http://forum.xda-developers.com/g4/help/recover-data-bootlooping-phone-t3313869
Download the files and read the instructions, it does say what models are supported and what not. Big cored disable tool is not a guaranteed way that you'll recover your phone but if it is outside warranty then you have nothing to lose.

iods said:
update
I successfully flashed it using LGup software .. all went aright , 100% ... phone reboots then comes that green android robot , then comes LG logo for a while and then everything goes black , like phone totally shutdown
Click to expand...
Click to collapse
Take it or send it to LG for warranty replacement or fix bleed them dry...

problem when I activate mobile data

hello
LG G4 H818p MM6.0
about 2 months i got a problem when i activate data mobile my phone go crazy it start clicking everywhere in the screen so it entre every where
that issue start just when i activate data mobile excepte that it work perfectlly
so can anyone tell me where the problem came from and what can i do ( without formating if it can )
i didn't install any suspicious application .
thx in advance

Do a factory reset

deltadiesel said:
Do a factory reset
Click to expand...
Click to collapse
thx my friend for the replie
i'm afraid if i do a factory reset i'll got that boot loop issue
i got the bootloop issue one day and i took my phone to LG customer service and thy fix it i don't know if i'll got this problem in the future

askimti said:
thx my friend for the replie
i'm afraid if i do a factory reset i'll got that boot loop issue
i got the bootloop issue one day and i took my phone to LG customer service and thy fix it i don't know if i'll got this problem in the future
Click to expand...
Click to collapse
Just factory reset

askimti said:
thx my friend for the replie
i'm afraid if i do a factory reset i'll got that boot loop issue
i got the bootloop issue one day and i took my phone to LG customer service and thy fix it i don't know if i'll got this problem in the future
Click to expand...
Click to collapse
The infamous boot loop issue is a hardware issue so anything you do with the software should not trigger it.

askimti said:
hello
LG G4 H818p MM6.0
about 2 months i got a problem when i activate data mobile my phone go crazy it start clicking everywhere in the screen so it entre every where
that issue start just when i activate data mobile excepte that it work perfectlly
so can anyone tell me where the problem came from and what can i do ( without formating if it can )
i didn't install any suspicious application .
thx in advance
Click to expand...
Click to collapse
I have the same problem recieving call or when theres bad signal.
Happens on Ressurection Remix Rom Oreo and now on Aoscp Chyper Rom Oreo 6.0.0 , happend on Ressurection android 7 too...usually stops after reboot for a couple of days
Phone is lg g4 h815

htr5 said:
The infamous boot loop issue is a hardware issue so anything you do with the software should not trigger it.
Click to expand...
Click to collapse
for me i got the bootloop issue when i tried the factory restor the phone

Dom46 said:
I have the same problem recieving call or when theres bad signal.
Happens on Ressurection Remix Rom Oreo and now on Aoscp Chyper Rom Oreo 6.0.0 , happend on Ressurection android 7 too...usually stops after reboot for a couple of days
Phone is lg g4 h815
Click to expand...
Click to collapse
for me when the phone do this crazy .... i turn it off ( by pressing the power button just once ) pressing it again and it stop just for few minute . then it start again .....
so you say that it stops on your phone after reboot that is it ???
i wonder where the problem came from

askimti said:
for me when the phone do this crazy .... i turn it off ( by pressing the power button just once ) pressing it again and it stop just for few minute . then it start again .....
so you say that it stops on your phone after reboot that is it ???
i wonder where the problem came from
Click to expand...
Click to collapse
Yea maybe 2 reboots but not all the time same way...sometimes after couple days sometimes in an hour or less...now im on stock 7 beta v29a testing and will see 2 days without it

Dom46 said:
Yea maybe 2 reboots but not all the time same way...sometimes after couple days sometimes in an hour or less...now im on stock 7 beta v29a testing and will see 2 days without it
Click to expand...
Click to collapse
One week and still no random clicks, try official LG rom otherwise i dont know solution for your problem.
Try v29a

i'm in V20H . i think thats the last official version for the Lg G4 MM 6.0 H818p
i want to up grade but i m a fraid of the bootloop issue
i think that i ll wait for an official auto update mybe it come