I've done a lot of googling so far, and I haven't seen anyone having this problem yet.
This phone is not yet rooted, and is still running the stock rom and recovery. I haven't been able to get to first base and unlock the bootloader with it because once I boot into Odin/download/fastboot mode, ADB can't see the device anymore.
Although I can turn USB debugging on and verify that ADB can see and list my device, if I reboot, and return to my Developer options menu, it will not still be checked. The problem, I believe, that's creating is that rebooting into Odin mode means that ADB can no longer see my device, because USB debugging has already been turned off. I don't think an app is doing this, because booting into safe mode, turning on USB debugging, and then rebooting into safemode again yields the same result: USB debugging has still been turned off. From the command prompt issuing "adb reboot fastboot" just yields a reboot back to the normal home screen.
EDIT: Upon further inquiry, do I even need USB debugging to get TWRP installed? According to:
http://www.cyanogenmods.org/forums/topic/install-twrp-recovery-samsung-android-using-odin/
they make no mention of USB debugging, only OEM Unlock which does not appear in the Developer Options for my phone...
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I am on the stock, rooted rom. I just got the OTA. But I need to flash reflash the stock recovery since I am rooted and on TWRP. But I can't seem to get USB debugging to work. I've tried rebooting both my PC and my phone, different ports, tried enabling and disable USB debugging in developer options, even tried resetting to default settings. But adb devices still shows blank on my PC. Any idea what is the issue? I usually got a pop up to show that ADB is being requested and I will have to agree to it but I cant seem to get that popup now.
sacredsoul said:
I am on the stock, rooted rom. I just got the OTA. But I need to flash reflash the stock recovery since I am rooted and on TWRP. But I can't seem to get USB debugging to work. I've tried rebooting both my PC and my phone, different ports, tried enabling and disable USB debugging in developer options, even tried resetting to default settings. But adb devices still shows blank on my PC. Any idea what is the issue? I usually got a pop up to show that ADB is being requested and I will have to agree to it but I cant seem to get that popup now.
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I had similar problem before. Try this, with no Connection to PC, revoke usb debug authorisations, and restored default in deverloper option, setbupn USB debug again then connect to PC . if that don't work , try rebooting pc
Sent from my SM-T819 using Tapatalk
formerly rooted H811. I unrooted with supersu and attempted to relock the bootloader. But It didn't take. It appears to be in some in between galaxy.
I get into fastboot, but "fastboot devices" comes up empty.
Would like to lock to update to 20X. No PC, only Mac.
LG Bridge sees USB, but not phone.
Help appreciated.
You do realize locking the bootloader will perform factory reset and wipe your data. Are you trying fastboot through MAC, not sure how it is different from PC so if that is causing the issue can't help much.
Is usb debugging enabled, and you have given permission in the pop-up that pops up on phone screen when you connect it to MAC/Computer the very first time? It is possible you missed that permission pop-up the first time and now permission is denied permanently. You may wanna uninstall and reinstall LG driver/device, connect phone again, and look for that permission pop-up on phone screen and allow it. Try connecting usb cable in different usb port too, that might make the pop-up appear again. Also, remember if bootloader is altered or you got custom recovery, phone will possibly soft brick and you will need to use LG Bridge or LG UP with phone in download mode to reflash kdz. Hope this helps.
Edit: For the permission pop-up to show, the phone needs to be turned on, be in mtp mode, and usb debugging to be enabled. Then once you have given permission, you use adb command to reboot into bootloader or i think with phone off, hold the volume down button while you connect to usb cable and not let go of the volume down button till phone is in fastboot menu.
no matter what I do, my xz1c remains unauthorized whenever I attempt to connect via adb. I've scoured the internet and tried everything. has anyone had this issue with their xz1c and resolved it? I'd like to debloat my phone, but cannot because I cannot fully use adb. any ideas?
bleggy said:
no matter what I do, my xz1c remains unauthorized whenever I attempt to connect via adb. I've scoured the internet and tried everything. has anyone had this issue with their xz1c and resolved it? I'd like to debloat my phone, but cannot because I cannot fully use adb. any ideas?
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Click to collapse
enable developer options - enable usb debug
1. Turn off usb debugging and developer options
2. Restart your phone
3. Turn on developer options and usb debugging
4. Plug in usb cable
5. Watch your phone screen carefully for an authorization dialog - and accept this. If you skip it, or cancel it by accident then you need repeat above steps.
6. ADB is now authorized.
I tried exactly this. Still "unauthorized".
Maybe current update of Android 9 blocks it.
Dean F said:
1. Turn off usb debugging and developer options
2. Restart your phone
3. Turn on developer options and usb debugging
4. Plug in usb cable
5. Watch your phone screen carefully for an authorization dialog - and accept this. If you skip it, or cancel it by accident then you need repeat above steps.
6. ADB is now authorized.
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Click to collapse
Greetings.
I have working Redmi Note 9. The problem is I forget the passcode. And the only way to remove it, it seems, by entering recovery mode. But mine is broken, it's board level so simply changing the button wont do anything. The volume - is working fine tho.
Or is there any way to remove the code without going to recovery?
Thanks )))
You'll need following things on your pc:
Android SDK platform tool
Drivers specific to your phone
USB debugging enabled on your device
Then on your phone:
OEM unlocked or Bootloader unlocked.
After you have all prerequisites,
Connect your device to PC using the USB cable and in PowerShell enter the following commands,
adb devices
It shows all devices connected to your PC.
Confirm that your device is connected by ensuring the correct build number.
For booting into recovery mode, use the following command,
adb reboot recovery
I got an Xperia 10 to flash /e/ OS on. I've got the bootloader unlocked. I had dev options turned on and accepted the RSA key, and tried to flash a recovery. It didn't seem to go through so I rebooted the phone. Now it won't prompt to authorize USB debugging, I deleted the RSA key on computer thinking maybe it was that. I've booted up usb with mAid and tried to get it to prompt for an RSA key on the computer with no luck. I've even tried going to a different computer altogether. I've also done some of the basic commands, kill-server, start-server, reconnect. I've reset the phone twice. One thing I've noticed is that usb debugging stays on even after a factory reset. Do I try locking and unlocking the bootloader again ? I'm not sure what else to do, has anyone else encountered this and overcame it?