Develop Bugs

Bootloop, Can't get past warning screen in download mode

Hey Guys
So my friend gave me a Note 2 with 4.1.1 that's stuck in safe mode.
So i tried installing TWRP to install a KitKat rom, but i forgot to format data "stupid me :\"
anyways at first it booted till the part where it's "optimizing apps"
after it got to "finishing boot" it rebooted and, well, it's stuck in a bootloop.
so i tried getting into recovery by pressing the 3 buttons, it just continues with booting into the bootloop.
then i tried getting in download mode, it gets to the warning screen, but it refuses to continue when i press the volume up button :|
any help?? thank you

taha_elfeituri said:
Hey Guys
So my friend gave me a Note 2 with 4.1.1 that's stuck in safe mode.
So i tried installing TWRP to install a KitKat rom, but i forgot to format data "stupid me :\"
anyways at first it booted till the part where it's "optimizing apps"
after it got to "finishing boot" it rebooted and, well, it's stuck in a bootloop.
so i tried getting into recovery by pressing the 3 buttons, it just continues with booting into the bootloop.
then i tried getting in download mode, it gets to the warning screen, but it refuses to continue when i press the volume up button :|
any help?? thank you
Click to expand...
Click to collapse
perhaps try to reboot you phone by long press power button...

if you could get the phone to be recognized by adb then you could use:
adb reboot download​
to get to download mode.
Just a reminder:
TWRP :Vol Up + Home + Power (Release Power Button when samsung logo appears, keep holidn Vol Up + Home untill you see TWRP )
Download Mode: Vol Down + Home + Power, then press up when warning appears.
Hope this helps.

dabenaute said:
perhaps try to reboot you phone by long press power button...
Click to expand...
Click to collapse
tried that, with no success
bobfbaby said:
if you could get the phone to be recognized by adb then you could use:
adb reboot download​
to get to download mode.
Just a reminder:
TWRP :Vol Up + Home + Power (Release Power Button when samsung logo appears, keep holidn Vol Up + Home untill you see TWRP )
Download Mode: Vol Down + Home + Power, then press up when warning appears.
Hope this helps.
Click to expand...
Click to collapse
that was how i used to get the phone in download/recovery back when it was in safe mode.
but now, adb can recognize the phone, but it's "unauthorized" and stuck in a bootloop so i'm screwed :\
Anyways i think i should just take it to a repair shop but thanks so much for ur help guys ^^

Device no longer boots or responds. Please help?

Here's what I did:
Had everything running fine with twrp installed and rooted.
Booted into twrp.
Wiped cache system and dalvik.
Restart.
Device wouldn't boot or go to recovery.
Attempt to follow THIS
Process fails.
Unplug device as instructions say.
Device battery dies.
Device will no longer boot into anything, including download mode.
Help?

cyrushehe said:
Here's what I did:
Had everything running fine with twrp installed and rooted.
Booted into twrp.
Wiped cache system and dalvik.
Restart.
Device wouldn't boot or go to recovery.
Attempt to follow THIS
Process fails.
Unplug device as instructions say.
Device battery dies.
Device will no longer boot into anything, including download mode.
Help?
Click to expand...
Click to collapse
Make sure your device is fully charged and turned off.
Simultaneously press and hold the power and volume down buttons.
When the LG logo shows up, release the power button only.
Now press and hold the power and volume up button while keeping your hold on the volume down button.
When the factory reset screen appears, release your hold on all buttons.
Press the power button to continue.
Press the power button again to confirm if you’re sure you wish to continue with the reset.

meanoc said:
Make sure your device is fully charged and turned off.
Simultaneously press and hold the power and volume down buttons.
When the LG logo shows up, release the power button only.
Now press and hold the power and volume up button while keeping your hold on the volume down button.
When the factory reset screen appears, release your hold on all buttons.
Press the power button to continue.
Press the power button again to confirm if you’re sure you wish to continue with the reset.
Click to expand...
Click to collapse
Hello, same thing happened to me yesterday night. I'm waiting for help... I can't even turn off the tab...

ruimiguel98 said:
Hello, same thing happened to me yesterday night. I'm waiting for help... I can't even turn off the tab...
Click to expand...
Click to collapse
Try holding down the power button for like 30 seconds.

help Zenfone 2 black screen, no bootloader or TWRP vibrartes twice and nothing

Hello
I was updating from a M version to another M verions. But I had to use the temporary recovery method.
This is what I was doing but didn't finish properly
Requirements:
1. Unlocked bootloader
2. TWRP for Z00A (Download | How to Install TWRP)
Unlock Bootloader on Android 6.0 Marshmallow ZenFone 2 ZE551ML/ZE550ML
Download tool (Download Here)
1. Extract it and connect Zenfone 2 with laptop/pc
2. Click unlock.bat will automatically detect whether the adb or fastboot mode, and then reboot into bootloader
3. Will appear on the screen to unlock the success of mobile phones after five seconds will reboot, then hold volume up the phone automatically re-boot back to bootloader.
4. If you missed the previous step, press the power button for 10 seconds off, then press the "Volume Up" and hold the power button to boot into bootloader.
5. After the phone has successfully re-enter the bootloader, click restore.bat on the computer, where the restore refers to the restore Android ifwi 6.0 otherwise Android phone can not enter the system.
6. The phone will reboot and restore white on black ASUS logo screen, and then enter the Android system.
Click to expand...
Click to collapse
I extracted and connect my zen2
Ran the unlock.bat
The phone entered the bootloader, flash his things and boot again but on the white screen
Then I had to hold power button 10s to turn it off and turn it on again
Entered the bootloadr by holding Power+Vol UP then to recovery.
At this time I just used the recovery as I usualy do, Wipe everything, cache, data, etc.
Connect to the PC, put the new UL-Z00A-WW-4.21.40.184-user.zip there and flash.
BUT now that comes the problem. I select the option to boot it after finish flashing.
So obviously I didnt finish the steps mentioned on the quote above.
I didnt ran the restore.bat before reboot into system and now All I see is black screen.
I've tryed some steps of those tutorials for briked phones but My computer can't see the device for long enough
http://forum.xda-developers.com/zenfone2/help/thead-bricked-phone-updating-to-mm-tips-t3452785
I try to do those steps but I'm stuck on this part
now back to the Zenfone 2, hold power for 20 seconds to shutdown, then press simultaneously the key "power" + "volume down", until phone vibrates. Or computer makes detection sound, wait a few seconds it will add an item immediately below intelSoC in device manager “MOOREFIELD” new devices is successful.
Click to expand...
Click to collapse
My phone doesn't boot even on bootloader. It just vibrate twice and then nothing happens.
On my device manager I can see the "Moorefield" but only for a brief moment. when I try to turn on the phone then it immediately disapears and repeat this process (Vibrate twice, long preiod doing nothing and still black screen, then vibrates again twice, repeat)
Any suggestion?
Thanks in advice

Seikushim said:
Hello
I was updating from a M version to another M verions. But I had to use the temporary recovery method.
This is what I was doing but didn't finish properly
I extracted and connect my zen2
Ran the unlock.bat
The phone entered the bootloader, flash his things and boot again but on the white screen
Then I had to hold power button 10s to turn it off and turn it on again
Entered the bootloadr by holding Power+Vol UP then to recovery.
At this time I just used the recovery as I usualy do, Wipe everything, cache, data, etc.
Connect to the PC, put the new UL-Z00A-WW-4.21.40.184-user.zip there and flash.
BUT now that comes the problem. I select the option to boot it after finish flashing.
So obviously I didnt finish the steps mentioned on the quote above.
I didnt ran the restore.bat before reboot into system and now All I see is black screen.
I've tryed some steps of those tutorials for briked phones but My computer can't see the device for long enough
http://forum.xda-developers.com/zenfone2/help/thead-bricked-phone-updating-to-mm-tips-t3452785
I try to do those steps but I'm stuck on this part
My phone doesn't boot even on bootloader. It just vibrate twice and then nothing happens.
On my device manager I can see the "Moorefield" but only for a brief moment. when I try to turn on the phone then it immediately disapears and repeat this process (Vibrate twice, long preiod doing nothing and still black screen, then vibrates again twice, repeat)
Any suggestion?
Thanks in advice
Click to expand...
Click to collapse
you must post question in the thread you are trying instead of making new one. any ways. long press power button to shut down the device completely. then press power button and volume down button. as phone vibrates release power button but keep holding volume down button and wait till moorefield appears in device manager. now release the volume button then click begin download in xfstk.
if u have further question post in in above thread you are following to unbrick

sukhwant717 said:
you must post question in the thread you are trying instead of making new one. any ways. long press power button to shut down the device completely. then press power button and volume down button. as phone vibrates release power button but keep holding volume down button and wait till moorefield appears in device manager. now release the volume button then click begin download in xfstk.
if u have further question post in in above thread you are following to unbrick
Click to expand...
Click to collapse
I did it already and only shows up for a brief moment like I said and then disappears a second before the phone vibrate

help please D:

Seikushim said:
help please D:
Click to expand...
Click to collapse
any luck fixing? i got the same result, no screen or anything, two vibrations since yesterday

Sadly, no.
no fix for me yet...
Let me know if you find something

You have tô unbrick your phone. There are some tutorials in the forum

I am using the Z008D variant of the Zenfone 2.
I had bricked my phone 3 times and the guides that had helped me are:
https://forum.xda-developers.com/zenfone2/help/thead-bricked-phone-updating-to-mm-tips-t3452785
https://forum.xda-developers.com/zenfone2/general/guide-brick-soft-hard-bricked-zenfone-2-t3284256
I too had the same problem the first time I unbricked my phone. The moorefield device would show up briefly in device manager. It is stated in the guide that you had to press power+vol down when connecting the phone to use xFSTK. I googled and found that you had to actually press and hold the vol down button only and then connect the USB cable, then release it when the moorefield device is detected.

op3 keeps rebooting

hi all
i need a little help here
i have a op3 it wont turn of
wen i hit power buttom for 12 sec it just start again an load start screen
then after 2-3 sec it reboots again
if i hold power an volume + it goes to fastboot screen stay there for 3-4 sec an then reboots again
an i cant use volume buttoms to select
they work because i can hit volume + an it enter fastboot

deleted

nobody ???

Same here
This same issue is happening with me. Were you able to fix it?

anand.deshpande84 said:
This same issue is happening with me. Were you able to fix it?
Click to expand...
Click to collapse
yes it was the power buttom
u have ro push it hard to get it to stop rebooting

Alternate method to get the phone back
Well, out of desperation, I did the following:
1. Keep fastboot and twrp recovery ready
2. Type in the fastboot recovery command in prompt
3. Press volume up and power button.
4. As soon as I get the fastboot screen, quickly connect your phone to the PC
5 As soon as you hear the new device connection music press enter on the command prompt
steps 4 and 5 should be completed within 5 seconds ?
Repeat steps 1 to 5 couple of times until you get the timing right.
Finally it worked for me on third attempt and I got my phone back ?
Once it booted normally I went back to the recovery, wiped the caches, ran diagnostic and repair disk tools nothing came out of the ordinary.
Hope it helps anyone with same problem..

How to reliably start TWRP

I have TWRP installed, and have managed to run it a few times. Now I cannot start TWRP at all.
From off, if I switch on, the following happens:
1) Screen with Samsung Galaxy A70 - Secured by Knox
2) 0.5 seconds later another screen, "this phone's bootloader is unlocked and it software integrity. .." and "press power key to continue..."
3) 5 seconds later, same screen as (1)
4) 3 seconds later, red letters "this phone is not running Samsung's official software"
5) 3 seconds later blank screen with "samsung" and then booting to android.

In my experience I have to flash twrp every time I want to use it( I don't know the reason but I couldn't fix it ) , for booting twrp on the other hand I turn off the phone first, then I press power button+volume down until the "this phones bootloader..." screen appears, here is the tricky part, you have to quickly let go of these two buttons, press power button, let go of the power button (after the warning disappeared) and then press volume down button (and hold it) until twrp logo appears, this happens really fast so you may need to do it a few times to get used to it.

mobin22 said:
In my experience I have to flash twrp every time I want to use it( I don't know the reason but I couldn't fix it )
Click to expand...
Click to collapse
Yes, same here, the only time I have managed to run TWRP on this phone, is right after a flash.
mobin22 said:
and then press power down button
Click to expand...
Click to collapse
Do you mean volume down?

Zilliman said:
Yes, same here, the only time I have managed to run TWRP on this phone, is right after a flash.
Do you mean volume down?
Click to expand...
Click to collapse
Power off the device, plug into a pc, wait for it to start charge, hold vol up and power till it turns on. Wala boots to twrp. If you have magisk installed,you can use the reboot option within magisk.

mobin22 said:
In my experience I have to flash twrp every time I want to use it( I don't know the reason but I couldn't fix it ) , for booting twrp on the other hand I turn off the phone first, then I press power button+volume down until the "this phones bootloader..." screen appears, here is the tricky part, you have to quickly let go of these two buttons, press power button, let go of the power button (after the warning disappeared) and then press volume down button (and hold it) until twrp logo appears, this happens really fast so you may need to do it a few times to get used to it.
Click to expand...
Click to collapse
Samsung changed how to enter recovery on Android 11. Power off device, plug into pc, wait for it to charge, then hold vol up and power till it turns on. Alternatively, if you have magisk installed, use the reboot options within magisk.

I did that. Thanks!
But it has gone to:
Android Recovery
Samsung /a70qxx/a70q
11/RP1A.200720.012./A705FNXXUB5DVB3
user/release-keys
Use volume up/down and power.
Reboot system now
Reboot to bootloader
Apply update from ADB
Apply update from SD card
Wipe date/factory reset
...
...
...
Where is TWRP? It seems it's gone.

Zilliman said:
I did that. Thanks!
But it has gone to:
Android Recovery
Samsung /a70qxx/a70q
11/RP1A.200720.012./A705FNXXUB5DVB3
user/release-keys
Use volume up/down and power.
Reboot system now
Reboot to bootloader
Apply update from ADB
Apply update from SD card
Wipe date/factory reset
...
...
...
Where is TWRP? It seems it's gone.
Click to expand...
Click to collapse
That's because you're not installing it properly go back to my guide and follow it exactly and stop listening to these other people. I've been modding this device since it first came out with Android 9, I know every inch of this device. You're getting confused by what other people are telling you

MarvinMod said:
5- Press and hold vol down and power till the screen turns blank then immediately press and hold vol up. The device will reboot then land you in the twrp splash screen
Click to expand...
Click to collapse
It fails here, on this step. After successful flash of recovery.tar, power + vol down to reboot, cable still connected, nothing you can do now can bring TWRP up. The phone boots into Android.
EDIT: I think I have now got it. I will update in a few mins.

Zilliman said:
It fails here, on this step. After successful flash of recovery.tar, power + vol down to reboot, cable still connected, nothing you can do now can bring TWRP up. The phone boots into Android.
EDIT: I think I have now got it. I will update in a few mins.
Click to expand...
Click to collapse
After successful flash of recovery.tar, power and vol down to reboot, as soon as the phone screen goes blank, immediately release all keys and press and hold vol up. Must be as soon as screen goes blank. The device will then reboot twice and land you in twrp splash screen. You must hit vol down and power after successful flash then when screen blanks, vol up. If you miss this step, twrp will not hold and revert back to stock recovery.

Here is the notes I made today:
****************************************************************
INSTALL + START TWRP
phone is off
press up + dn
insert cable
go into download (press up)
ODIN 3.14 + AP:tar(vbmeta.img+twrp.img), auto reboot off, press upload
when it succeeds, press dn + pwr until it reboots
then quickly up + pwr until it starts (no need to hold down)
this starts in TWRP
from powered off
press pwr button
goes into twrp or android(system) -- depending on what was used last time
if we used reboot->system last time it will now **Always** go into system!
to go back into twrp:
switch off
power cable until charge
pwr + up until it starts
****************************************************************
The above means that you CANNOT go back to TWRP unless you have a cable and a PC near by.