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[Q] device not detected though conncted and shown in device manager

My pent ws 708 c is connected to the computer pdanet3.02 is installed it shows in device manager as Android composite ADB interface. but in command prompt under list of devices attached there is no number nothing.i am able to access internet through the device on xp but when trying to take backup using sdk command prompt says adb unable to connect to device. what needs to be done?

glad to use technology said:
My pent ws 708 c is connected to the computer pdanet3.02 is installed it shows in device manager as Android composite ADB interface. but in command prompt under list of devices attached there is no number nothing.i am able to access internet through the device on xp but when trying to take backup using sdk command prompt says adb unable to connect to device. what needs to be done?
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Click to collapse
if you are accessing internet you cannot access adb at same time you need to disconnect internet tethering to access device from adb

situation remains same
Well the situation is absolutely the same even after diabling tethering

[How-To]ADB not able to recognize device

I tried running the command - ADB devices, and it does not show my device, but when I run the command fastboot devices, then I can see my device.
I am using this to take a backup and remove the pattern from my phone as I forgot the pin here.
But most functionality is present with the ADB command.
A lot of posts have suggested checking if the USB Debugging option was on, and MTP is on, but since the phone is password locked, I am unable to check either of them.
Can you please help me out, as this phone has a lot of data that needs to be recovered?

Mija21 said:
I tried running the command - ADB devices, and it does not show my device, but when I run the command fastboot devices, then I can see my device.
I am using this to take a backup and remove the pattern from my phone as I forgot the pin here.
But most functionality is present with the ADB command.
A lot of posts have suggested checking if the USB Debugging option was on, and MTP is on, but since the phone is password locked, I am unable to check either of them.
Can you please help me out, as this phone has a lot of data that needs to be recovered?
Click to expand...
Click to collapse
I was able to get the ADB device detected by entering the recovery mode. Previously I was trying to run the command while in fastboot mode.
So I have now been able to get the ADB devices, but now I am getting device unauthorized, due to which I am unable to enter the shell.
Is there any way, where I can use ADB without clicking on the device for authorization.
Thank You in advance

If
Code:
adb devices
doesn't show your phone as connected then a connection couldn't get established. Point.
FYI: The major reason why you get "Unauthorized Error" is that you haven’t authorized your PC to recognize your device in ADB Mode. You probably haven't enabled the USB Debugging on your device and that is where you are getting the alphanumeric code. The "unauthorized message" is because you haven’t given your permissions to authorize this connection.

jwoegerbauer said:
If
Code:
adb devices
doesn't show your phone as connected then a connection couldn't get established. Point.
FYI: The major reason why you get "Unauthorized Error" is that you haven’t authorized your PC to recognize your device in ADB Mode. You probably haven't enabled the USB Debugging on your device and that is where you are getting the alphanumeric code. The "unauthorized message" is because you haven’t given your permissions to authorize this connection.
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Click to collapse
@jwoegerbauer That might be the case, but now there is no way to check and change or authorize as my device is locked and I do not remember the password. Is there any way I can bypass or get around this step.

Mija21 said:
@jwoegerbauer That might be the case, but now there is no way to check and change or authorize as my device is locked and I do not remember the password. Is there any way I can bypass or get around this step.
Click to expand...
Click to collapse
factory reset

How to Install adb/fastboot on Android device (phone) to use to fix another phone

A friend of mine has a Stylo 6 that says corrupted when it boots. It is however already set to USB debugging. However, I do not have access where I'm at to a PC or a Chromebook to install the dev tools. Is it possible even with third party paid software to install the dev environment on another Android phone and use it for fastboot etc?

You don't need to add ADB and/or Fastboot to any Android device. In common both ADB and Fastboot ( the latter only unless OEM decided to omit it ) are integral part of every Android release: ADB is housed in Android's user-space, Fastboot typically is part of device's bootloader unless Android has a Dynamic Partition layout, then Fastboot is also housed in Android's user space.

Ok, I guess what I need to know if I can install and use adb server on an Android device. I don't have access to a PC Mac or Chromebook to install the sdk tools. Can this be installed on my phone ( using a Linux or windows emulator maybe) to use to fix his phone?

ADB is nothing more than a tool that allows you to execute commands which would interact with Android shell. So you can install / open in Android a shell app ( e.g. Termux ) and run the commands ( Linux compliant ) therein. Will say you don't need a computer to operate on Android system of device,

Access personal data with broken screen and root/usb debugging enabled (but not authorized)

hi guys I need help to recover some personal photos I had saved on my device. The phone has a broken screen and touch so I cannot use a mouse or try to blindly unlock it, but it has been rooted and usb debugging is enabled; unfortunately my pc is not authorized by the phone and I have no way to authorize it through the pop up without a screen. I have searched around many forums to find a solution but it seems every time there was something wrong, so I need some help.
The solution that got me the nearest to a conclusion that I tried are:
using adb in custom recovery (which I do have) and trying commands like "adb pull /sdcard" which resulted in "pull: building file list... 0 files pulled. 0 files skipped.", I don't understand why it's unable to pull any file.
trying to authorize usb debugging for my pc through adb by "adb push adb_keys /data/misc/adb", adb_keys is the adbkey.pub file in the .android folder renamed. I can confirm i pushed them since "adb pull /data" pulled "data/adb/misc/adb_keys" as the only file, but I still don't have authorization
I'm not too literate in this kind of commands so please be patient but I really need help
RECAP OF MY PHONE STATUS
Xiaomi Mi 10 5G is the device
both screen and digitizer broken, I'm not able to see the screen or use touch (but I'm 100% sure the phone still works)
Android 12 rom (xiaomi.eu stable)
custom recovery available
rooted device
usb debugging enabled
no device authorized by the phone for usb debug

I found somewhere on xda that the problem could be solved by mounting/unmountind sdcard, but I have no ideea hoe to do that

damndaniel0 said:
hi guys I need help to recover some personal photos I had saved on my device. The phone has a broken screen and touch so I cannot use a mouse or try to blindly unlock it, but it has been rooted and usb debugging is enabled; unfortunately my pc is not authorized by the phone and I have no way to authorize it through the pop up without a screen. I have searched around many forums to find a solution but it seems every time there was something wrong, so I need some help.
The solution that got me the nearest to a conclusion that I tried are:
using adb in custom recovery (which I do have) and trying commands like "adb pull /sdcard" which resulted in "pull: building file list... 0 files pulled. 0 files skipped.", I don't understand why it's unable to pull any file.
trying to authorize usb debugging for my pc through adb by "adb push adb_keys /data/misc/adb", adb_keys is the adbkey.pub file in the .android folder renamed. I can confirm i pushed them since "adb pull /data" pulled "data/adb/misc/adb_keys" as the only file, but I still don't have authorization
I'm not too literate in this kind of commands so please be patient but I really need help
RECAP OF MY PHONE STATUS
Xiaomi Mi 10 5G is the device
both screen and digitizer broken, I'm not able to see the screen or use touch (but I'm 100% sure the phone still works)
Android 12 rom (xiaomi.eu stable)
custom recovery available
rooted device
usb debugging enabled
no device authorized by the phone for usb debug
Click to expand...
Click to collapse
There is a way to do it, but it costs money

@damndaniel0
If USB-MTP mode is enabled on phone - what should be default - then you can access all user-data stored in /storage/emulated/0 directory where among others photos are stored.
See also here:
MTP USB Device Driver Windows 10 64bit Driver | Device Drivers
MTP or (Media Transfer Protocol) is a set of custom extensions to the Picture Transfer Protocol (PTP) devised by Microsoft, to allow the protocol to be used for devices other than digital cameras, for example digital audio players such as MP3 players, and other portable media devices, for...
oemdrivers.com

xXx yYy said:
@damndaniel0
If USB-MTP mode is enabled on phone - what should be default - then you can access all user-data stored in /storage/emulated/0 directory where among others photos are stored.
See also here:
MTP USB Device Driver Windows 10 64bit Driver | Device Drivers
MTP or (Media Transfer Protocol) is a set of custom extensions to the Picture Transfer Protocol (PTP) devised by Microsoft, to allow the protocol to be used for devices other than digital cameras, for example digital audio players such as MP3 players, and other portable media devices, for...
oemdrivers.com
Click to expand...
Click to collapse
If you mean simply to connect the phone through usb to pc, I cannot do that because MIUI asks everytime if I want to transfer photos, files or just charge with a pop up on screnn (which I obviously cannot do)

iBowToAndroid said:
There is a way to do it, but it costs money
Click to expand...
Click to collapse
what would it be

damndaniel0 said:
If you mean simply to connect the phone through usb to pc, I cannot do that because MIUI asks everytime if I want to transfer photos, files or just charge with a pop up on screnn (which I obviously cannot do)
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Click to collapse
Not in system but in custom recovery (which you do have).

Timmmmaaahh! said:
Not in system but in custom recovery (which you do have).
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Click to collapse
Honestly I did not try, but I don't remember the phone directory showing up in windows file explorer after connecting the phone in recovery mode, I'll try againg when I'm home and I'll let you know

anyway I checked and no, I cannot access phone files

In Recovery mode you should can run
Code:
adb devices
adb pull <LOCATION_OF_DATA_OF_INTEREST> <STORAGE_LOCATION_ON_PC>

xXx yYy said:
In Recovery mode you should can run
Code:
adb devices
adb pull <LOCATION_OF_DATA_OF_INTEREST> <STORAGE_LOCATION_ON_PC>
Click to expand...
Click to collapse
unfortunately the result of this operation is always "pull: building file list... 0 files pulled. 0 files skipped". I tried already to pull form /sdcard, /storage, /data. Am I getting the location wrong?

Save data from blocked Android

Hi,
A friend of mine want's to recover some pictures from an old phone of his, but he forgot the pattern to unlock the device...
* The phone is a CAT S41 stock android.
* The phone is in perfect conditions
* The USB debug option of the phone is disabled.
- Because of that, I've been unable to execute any adb commands on the device.
- When the phone is in Recovery Mode, the device is detected by adb, but unauthorized:
[email protected]:~$ adb devices
List of devices attached
S411931008366 unauthorized
[email protected]:~$ adb shell
adb: device unauthorized.
This adb server's $ADB_VENDOR_KEYS is not set
Try 'adb kill-server' if that seems wrong.
Otherwise check for a confirmation dialog on your device.
Click to expand...
Click to collapse
I've tried to set the $ADB_VENDOR_KEYS manually, with no success.
In this situation, I have some questions to ask:
1. Is there a known way of bypassing the pattern lock?
2. Is there a known way of dumping data to any other device, in order to retrieve the pictures
3. Can the debug options be activated somehow?
As a last resource, I'd be willing to open the phone and spend some bucks on whatever hardware is needed to dump the whole disk, if that is relatively feasible to do.
4. Could you give me any feedback/information on hardware methods of dumping the disk of the phone? 0 experience there.
I would greatly appreciate any input you could give me.
If more details of the system or the situation are needed, please ask.
Thank you kindly for your attention,
abocador

Can't offer a solution.
But, even if there is a way to dump the files - what requires phone's Android is got rooted and USB-Debugging is activated , IMO it makes no sense to waste more time in this because since Android 4 data are AES-128 encrypted ( FBE and/or FDE method ) and the encryption probably can't get cracked.

2. + 4. won't work because of encryption, but 1. + 3. is possible on that old android 7 mediatek device.
assuming device runs on FDE full-disk encryption, is encrypted with default_password, one can hack boot.img and authorize usb-debugging. because device decrypts itself on boot that's all you need to get access.
but first install VCOM preloader drivers and make a readback of device with WwrMTK v2.51 + SP Flash Tool (old method) or mtkclient (new method).
I will tell you how to patch and resign boot.img once you made the important backup step. most important partitions are userdata+metadata.
Btw there is maybe another (even more easier) method. Just port TWRP recovery for that device. Because of weak security implementation phone will boot into custom recovery on locked bootloader (I did on Cubot King Kong)

Hi,
Thank you a lot for your reply.
I've been trying to do the backup, but I wasn't able to even use the mtkclient
I think I will just forget about this.

you know device must powered off completely, and preloader only says 'Hello' to computer for ~ 1 second? Did you install VCOM preloader drivers during that second (device manager -> pick device -> Update Driver -> Browse my computer for driver software -> Let me pick from the list of device drivers on my computer -> Show all devices -> Have Disk) ?

Hello again!
Yes, I'm aware the device must be powered off.
I'm quite sure I have all the drivers I need. I'm working from a Debian system.
Some weeks ago, I posted the log I get when I try to connect mtkclient to the phone:
Error on sending data: DA hash mismatch · Issue #575 · bkerler/mtkclient
Hi! I'm trying to use this tool on a CAT S41 phone, but I'm unable to get any proper connection between the device and my computer. After initializing the GUI with_python mtk_gui_, I get the follow...
github.com
One more time, thanks for your help,
I think I'm going to park this project for a while.
Cheers,
abocador

okay, for linux no need for drivers looks good, have you tried some random cmd line usage just for fun?
Code:
python3 mtk printgpt
python3 mtk rl out
python3 mtk crash
python3 mtk --preloader printgpt
python3 mtk --preloader rl out