Develop Bugs

(Q) Key Combo To Enter Recovery

Does anyone know if this phone has a key combo that will get you into recovery and or reboot your device? My sgs2 has this feature. All you have to do is hold all three buttons for a few seconds and it reboots, a couple seconds longer than that it reboots into recovery. I really hope that samsung implemented a similar feature because that came in handy

Vol up + vol down + power
it brings you to a bootloader. press vol down until you see Recovery and when it goes there hit Power.

This does not work if the device is really hung, e.g. if /init is bad. For that situation is there any alternative to pulling the battery? I'm hoping to preserve /proc/last_kmsg, which only a soft reset does.

ericehouse said:
This does not work if the device is really hung, e.g. if /init is bad. For that situation is there any alternative to pulling the battery? I'm hoping to preserve /proc/last_kmsg, which only a soft reset does.
Click to expand...
Click to collapse
Not that I'm aware of, the phone won't even respond to any commands through the prompt unless your in fastboot or android.

Tried flashing Viper and now can't get to fastboot menu!

I tried flashing ViperOneM8 1.8.0 (ViperOneM8 1.7.1 -> 1.8.0) which I guess was the wrong thing (I think that was an update, should have started with 1.7.1 first). Anyway... Now my M8 boots to some type of android base OS without a lot of things...
1) It's not possible to get to settings as there is no settings app in the app drawer.
2) There is no title bar/task bar at the top. The area that holds the time, and a few icons at the top is gone.
3) There is no background.
4) There is no way to get on the WiFi do to #1 and because of this I can not add my google account. That in turn means no google play store access.
But the BIGGEST thing of all... I CAN NOT BOOT TO FASTBOOT!!!
- Power the device off.
- Hold the volume down button (also tried the volume up button) + press power usually boots strait to fastboot mode.
I THINK it has something to do with the fact that by default in the settings I need to untick the fastboot option in the dev options.. Well I can't get to settings. Now what?

arvo.bowen said:
I tried flashing ViperOneM8 1.8.0 (ViperOneM8 1.7.1 -> 1.8.0) which I guess was the wrong thing (I think that was an update, should have started with 1.7.1 first). Anyway... Now my M8 boots to some type of android base OS without a lot of things...
1) It's not possible to get to settings as there is no settings app in the app drawer.
2) There is no title bar/task bar at the top. The area that holds the time, and a few icons at the top is gone.
3) There is no background.
4) There is no way to get on the WiFi do to #1 and because of this I can not add my google account. That in turn means no google play store access.
But the BIGGEST thing of all... I CAN NOT BOOT TO FASTBOOT!!!
- Power the device off.
- Hold the volume down button (also tried the volume up button) + press power usually boots strait to fastboot mode.
I THINK it has something to do with the fact that by default in the settings I need to untick the fastboot option in the dev options.. Well I can't get to settings. Now what?
Click to expand...
Click to collapse
Shut down phone.
Turn it on
Hold volume up+power button until it restarts
As soon as you get the black screen for restart release power button and hold volume down.
If your timing is right you will enter bootloader.
I tried it and it definitely works
Flash your nandroid or any rom you know was ok to begin with and you are up and running!!!

stathis95194 said:
Shut down phone.
Turn it on
Hold volume up+power button until it restarts
As soon as you get the black screen for restart release power button and hold volume down.
If your timing is right you will enter bootloader.
I tried it and it definitely works
Flash your nandroid or any rom you know was ok to begin with and you are up and running!!!
Click to expand...
Click to collapse
Tried that...
1) Powered off device.
2) Held power button for about 2 seconds until it came on then let go.
3) IMMEDIATELY I pressed and held down the power and volume up buttons.
4) The phone continues to boot up a little bit longer and gets to the verizon check (verizon splash screen) then shortly after goes black (as expected).
5) IMMEDIATELY let go of power button continuing to hold volume up button.
... .. .. .
6) I get the white screen that says HTC (powered by android)... NOT a bootloader screen as expected.

Update... When I try to click on the app drawer then top right click the little three dots, I try and "Manage Apps" ... ERROR "App isn't installed"...
:/

arvo.bowen said:
Update... When I try to click on the app drawer then top right click the little three dots, I try and "Manage Apps" ... ERROR "App isn't installed"...
:/
Click to expand...
Click to collapse
If you connect the phone to the computer, can you get fastboot or adb to recognize the phone?
If so, you can try adb reboot bootloader command or fastboot reboot bootloader comand

arvo.bowen said:
Tried that...
1) Powered off device.
2) Held power button for about 2 seconds until it came on then let go.
3) IMMEDIATELY I pressed and held down the power and volume up buttons.
4) The phone continues to boot up a little bit longer and gets to the verizon check (verizon splash screen) then shortly after goes black (as expected).
5) IMMEDIATELY let go of power button continuing to hold volume up button.
... .. .. .
6) I get the white screen that says HTC (powered by android)... NOT a bootloader screen as expected.
Click to expand...
Click to collapse
After 4 you release power button and press volume DOWN.
This will get you to the bootloader

stathis95194 said:
After 4 you release power button and press volume DOWN.
This will get you to the bootloader
Click to expand...
Click to collapse
Yea, I ended up doing the following...
1) While device is powered on, Press and hold Volume Up + Power until device reboots.
2) When it starts to reboot continue holding the Power button and change to the Volume Down.
That worked for me.

Unlock Bootloader Lenovo C2

Hello help unlock bootloader smartphone lenovo C2 ( k10a40 ) fastboot oem unlock and click button Volume Up not work

Ranisblogru said:
Hello help unlock bootloader smartphone lenovo C2 ( k10a40 ) fastboot oem unlock and click button Volume Up not work
Click to expand...
Click to collapse
Hold all three buttons down till drop out to power off.
Hold down up and power up key same time.
Once you see on screen with image?
Release the power key..
Still holding that up key...
If you see that boot screen change release.
See if that works.
Hold all 3 till power down.
Make sure you if you can. Pop out the battery and pop back in if possible.
Then hold the power and that other key.
Once you see or feel something release the power key. Then once anything comes up on screen keep holding the up key for like 6-7 seconds or until u see something.
Another way is to boot into android and use adb to make the phone go into recovery reboot. Also try a program if you would like to reboot into recovery.
There are lib files and some places that reference that key layout in boot.img did you possibly do anything to change anything?
Nothing happens without reason.
I hope this information can help you.

solarsoap said:
Hold all three buttons down till drop out to power off.
Hold down up and power up key same time.
Once you see on screen with image?
Release the power key..
Still holding that up key...
If you see that boot screen change release.
See if that works.
Hold all 3 till power down.
Make sure you if you can. Pop out the battery and pop back in if possible.
Then hold the power and that other key.
Once you see or feel something release the power key. Then once anything comes up on screen keep holding the up key for like 6-7 seconds or until u see something.
Another way is to boot into android and use adb to make the phone go into recovery reboot. Also try a program if you would like to reboot into recovery.
There are lib files and some places that reference that key layout in boot.img did you possibly do anything to change anything?
Nothing happens without reason.
I hope this information can help you.
Click to expand...
Click to collapse
Not work

I think I figured it out:
1. Boot up normally
2. go to Settings-About Phone-Device Info and repeatedly tap onto build number
3. go to Settings-Developer Settings and enable OEM unlocking and adb debugging
4. on your pc, download adb and fastboot
4.5 plug your phone into the pc
5. if a window on your phone pops out click ok
6. on your pc open cmd and go into your adb and fastboot folder
7. type adb reboot bootloader
8. type fastboot oem unlock
9. hold VolumeUp-VolumeDown-Power until the menu changes
10. unplug the cable and pop out the battery
11. put the battery back in and plug your phone in
12. hold VolumeUp-VolumeDown-Power
13. When you see the lenovo screen stop holding power
14. when you see No Command screen stop holding VolumeUp-VolumeDown
15. Press VolumeUp-VolumeDown-Power 2 times
16. You are in the recovery mode and you can access the bootloader from there

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 )
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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?
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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.
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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
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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.

Redmi Note 5 Pro power button problem.

I have problem with power button in Redmi Note 5 pro, the system doesn't respond to power button sometimes, can't turn on device by power button because sometimes holding button is not working sometimes. I entered into Fastboot mode and used fastboot reboot command, any way to fix that? clean something, or just go to phone service?

jotkauser000 said:
I have problem with power button in Redmi Note 5 pro, the system doesn't respond to power button sometimes, can't turn on device by power button because sometimes holding button is not working sometimes. I entered into Fastboot mode and used fastboot reboot command, any way to fix that? clean something, or just go to phone service?
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Click to collapse
It probably a hardware issue, taking the phone to service center seems the right choice.

Please try the following if the power button does not work again. Press the silent button once and then the power button. If it works then, it could also be a software problem. I had this behavior with the Havoc-OS rom. Since switching to Arrow-12.1 I have not had this problem until now.