Develop Bugs

[Q] F180 (vol up + power) does't work

Main information. F180, bootloader unlocked with teenybin, I'm on resurection lp rom.
Everything worked fine but I accidentally flashed the wrong file, now the phone is in boot loop. Though that is not the problem (I know how to fix it).
The problem is that there is no way I can access recovery. This happened to me before but I got lucky - computer detected the phone while it was in bootloop and I was able to use (adb reboot recovery). Next time I got lucky some kind of green screen showed up and from there I was able to go to recovery. Now i know that the most obvious way to go to recovery is through bootloader (vol up + power) but no matter how many times and in what diffrerent ways I try it I can't boot into bootloader it simply starts booting the rom... I am frustrated and have zero ides. Maybe you have some. Thank you in advance.
P.s.: i held down the power button for over 1 minute before attempting. And also download mode works.

If you can still boot into download mode you can try to flash the original firmware with the LG flash tool:http://forum.xda-developers.com/showthread.php?t=2797190
Don't worry you can use it for the LG Optimus G too:fingers-crossed:

Thank you for the idea, but I managed to solve my problem the same way as before. Use adb while the phone is in bootloop.

[Q] LG G E988 can't boot in download mode

Hi all.
I need help from a hivemind. I've got a LG G E988 with E98820B firmware. I've rooted it via ioroot (successfully) and tried to install custom recovery via freegee, and now my phone is not booting into download mode. If I try to reboot it from my PC using adb, I get "boot certification verify" error. Otherwise phone is booting fine into it's stock HK firmware.
So, long story short, I need download mode to flash stock european firmware but I have this strange error. Closest thing to solution of my problem is this thread , but I want something less radical. In case if something less radical exists.
Any ideas?

fautro said:
Hi all.
I need help from a hivemind. I've got a LG G E988 with E98820B firmware. I've rooted it via ioroot (successfully) and tried to install custom recovery via freegee, and now my phone is not booting into download mode. If I try to reboot it from my PC using adb, I get "boot certification verify" error. Otherwise phone is booting fine into it's stock HK firmware.
So, long story short, I need download mode to flash stock european firmware but I have this strange error. Closest thing to solution of my problem is this thread , but I want something less radical. In case if something less radical exists.
Any ideas?
Click to expand...
Click to collapse
Did you power off device via home power button? When you power down, then try to power back on just hit the power button then hold the plus and minus volume rocker while letting go of power button.

Yes. It casually boots up into rom. I think I somehow messed up my recovery. So is there any way to restore recovery, or flash custom recovery, without booting up in download mode?

fautro said:
Yes. It casually boots up into rom. I think I somehow messed up my recovery. So is there any way to restore recovery, or flash custom recovery, without booting up in download mode?
Click to expand...
Click to collapse
Enable USB Debugging
Connect mobile with PC and select LG Software (Wait for 1-2 minutes and let the drivers install)
Once drivers are installed, Run LG flash tool and start flashing KDZ. It will automatically boot it into download mode and flashing process will start. (If flashing stops / stuck at 4% and your phone is in download mode, remove USB cable, close LG flashtool.... connect USB cable again and restart KDZ flashing)

Tried. Now I can't boot into download mode AND can't boot into rom. And none of my computers see my phone in this state. Any possible explanations for such situation? And what to do about it..

[Q] Can't boot to recovery using buttons

Can't boot to TWRP after turning off.
From TWRP manager no problem, but I'd like to be able to boot instantly to recovery or download (fastboot).
Everyone uses the Power + Vol Down keys...and works on every video from youtube...but with me it doesn't.
Also I can't boot to fastboot any way I tried (hardware or software ways)
Any ideas???
Thanks

When you do the button method, do you let go at the lg logo then immediately press again? If so, don't let go. Just keep holding past the logo.

You can't boot also to download mode you say ? Which method you used to install recovery ?
Your G3 model ? D855 ?

Cannot enter recovery mode

Hey All,
I have recently rooted my Xperia T2 with hopes of entering the wonderful world of customization. However, I cannot enter recovery mode at all. I have exhausted Google looking for a solution prior to registering here. I have tried everything from downloading apps such as Quick Boot to connecting to PC and trying the adb command ''adb reboot recovery'' and ''adb reboot-bootloader'' and of course I have tried the obvious of turning off the phone and then powering back on while holding the power button and volume up key at the same time. Performing that action shows the phone powering on with the Sony screen followed by a black screen where the phone vibrates 3 times and will continue in this loop if I don't release the keys, If I do release them the phone just starts normally. In all cases, that is is what is happening, the phone restarts and boots normally.
I have checked that everything is OK with the rooting that I did via the app Root Checker and and checked bootloader unlocked status via the command ''*#*#7378423#*#*''.
So, there you have it and I just can't understand why I can't enter the recovery mode. My main goal for the moment is to free up some RAM by doing the Link2SD method but without getting into the recovery mode, that seems hopeless.
Hopefully someone here can advise me.
Thanks for reading and have a great day!

I can't enter recovery mode too... also already unlocked my bootloader but recovery still unacessible.
See what I did:
(DONE) - Unlocked my bootloader;
(FAIL) - Tryed to root by using KingRoot (2 differrent versions, one that I saw in a tutorial and the newer version - cause I'm using the newer T2 Ultra firmware)
(FAIL) - Tryed to install a custom recovery and as a gift, my T2 started an infinite bootloop.
(DONE) - Fix the boot loop problem...;
(FAIL) - Enter recovery mode and flash a Pre Rooted Firmware;
(DONE) - Searching how to flash a custom recovery again...
(DONE) - Installed a custom recovery (TWRP)...
Now I have another problem... wen a I try to turn It on, It only goes to recovery, and the notification led blinks red and then purple. There's anything I can do to fix It?

The very same problem i am facing now
I wanted to upgrade to higher version of lollipop but not able to get in recovery mode though i have already rooted n installed NDR utils BUT not able to get in recovery mode even via app
Any one who can help US OUT ?? !

I have same problem i can't enter to recovery mode by hold power button and volume + or volume - i try a lot of other combinaison but it doesn't work , help us thanks

I know it's too late for a reply but if u still wandering for how to flash a custom recovery first you need to install one as our Sony phones doesn't come with stock recoveries as mtk and Samsung devices have. Now go to http://forum.xda-developers.com/t2-ultra/development/t2-ultra-xzdualrecovery-qa-t2823793 for Complete tutorial on flashing and downloading a custom recovery. I have installed it with no errors

H815 stuck in bootloop, no download mode or recovery

Hello,
I unlocked the bootloader on my LG G4, flashed TWRP and then using TWRP flashed a SuperSU plus a new bootloader for Android M along with the Android M system etc...
The phone is now stuck in a bootloop.
I can no longer get in to TWRP and can get into download mode very briefly before the phone reboots again. My PC can not detect the phone at all.
Can anyone help? Have a feeling I've hard bricked the phone
Thanks, Ben

i have the same issue

benlanghorne said:
Hello,
I unlocked the bootloader on my LG G4, flashed TWRP and then using TWRP flashed a SuperSU plus a new bootloader for Android M along with the Android M system etc...
The phone is now stuck in a bootloop.
I can no longer get in to TWRP and can get into download mode very briefly before the phone reboots again. My PC can not detect the phone at all.
Can anyone help? Have a feeling I've hard bricked the phone
Thanks, Ben
Click to expand...
Click to collapse
wait flastool update for put android 6.0 kdz . antiroll back system on motherboard

Hello Everyone. Someone has got news? Cause my lg g4 stuck on the same issue.
I unlock bootloader and try to install twrp. Via fastboot flash command twrp doesn't seem to get installed. So i try to boot in twrp and then install the img to the recovery partition. All seemed to go fine. When i try to reboot to recovery twrp ask me to root the device. Why not? I leave twrp installs superSu (I think this was my mistake). Now I've a continuous bootloop, even if I simply plug it to the charger. Vol down + Power buttons neither vol up + power doesn't work.
Sorry for bad english

I think one way is to disconnect the battery by disassembling the phone(check Google), then reconnect it and boot to recovery using the correct key combinations. I hope it works.It worked for me.

Install the LGUP tool:
http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
Install both file.
Download the kdz files:
http://forum.xda-developers.com/showpost.php?p=64298942&postcount=6
This V20A MM, for 5.1 or v20b you have to search.
Power down your phone.
Push and hold Volume Up and then plug the phone via USB to your PC.
The Phone enter the download mode.
Start LGUP, select the KDZ file.
If you choose "upgrade" all data will be obtain, if you choose "refurbish" all data will be lost.
I suggest "refurbish" because for me "upgrade" dont work without fc and system carshes.
Wait around 5 minutes and your G4 is back with MM, clean and fresh.

Thanks hannsheinz for the reply.
I solved this night in this way (very similar to your suggestion):
- I downloaded and installed LG Bridge from the official website.
- I pull out the battery to power off the device.
- I reinsert the battery in the device, without power it on.
- I plug in the usb while pressing volume up button.
- The device entered the download mode and LG Bridge recognized it.
- I press "update error recovery" in Lg Bridge (bottom right in the Software update tab).
- The procedure will take a while according to your pc and internet connection.
- At the end my G4 "breathed again and still breathing"
Very similar to what hannsheinz suggested.
Thanks to all