[android] How to fix: Error device not found with ADB.exe

In cmd when I try to do the command:

adb shell

it shows device not found error. Can someone help me please. It'll be appreciated.

For me, I have to Revoke USB debugging authorizations in Developer Options. Here is the steps:

1. Turn off USB Debugging,
2. Revoke USB debugging authorizations,
3. Plug the cable back in,
4. Turn on USB Debugging

Another issue here is that you likely need to turn off "connect as media device" to be able to connect with adb.

It depends on windows system but usually:

1. you go to system properties
2. look at hardware devices
3. Right click on the yellow (has to be yellow if it's driver problem) icon representing your mobile device
4. select property
5. Then go on the driver tab
6. select update driver
7. choose the bottom selection find on local computer
8. then choose manually
9. From the windows opened look for driver disk the bottom right button
10. Choose the driver from the folder <sdk>\extras\google\usb_driver\i386 (or amd64 for and).
11. Remember to uncheck the show only compatible hardware.
12. Then choose the driver
13. When windows warn your about possible incompatibility go on.

For my mobile it works, but depend on your mobile if it work or not.

Hope this help, bye.

I have a Droid 3 (Verizon). I went to Motorola here and found the driver for the device 'Motorola ADB Interface' which was showing in device manager. It's kind of a big download for just the driver, but during installation it found it and installed correctly.

How about:

Settings -> System -> Developer options -> Debugging -> turn on toggle for Wireless ADB debugging

or:

Revoke USB debugging authorizations

and try from the scratch.

Developer options

• USB Debug

if you can not see developer option, go to about. build version and click build version until developer options in unlock.

On my G2 I had to select PTP instead of MTP mode to get the connection to work.

This worked for me, my AVG anti virus was deleting my adb.exe file. If you have AVG try: 1) opening the program 2) go to options 3) go to the virus vault and click on it 4) find your adb program, click on it, and press RESTORE at the bottom This will move the file back to its original place. However, unless you turn off the AVG it will delete the file again.
After this android studio located the file. Good luck.

Don't forget to go to your device and enable Settings->Developer Options->USB debugging.

Try any of the following solutions. I get errors with adb every now and then. And one of the following always works.

Solution 1
Open command prompt as administrator and enter

1. adb kill-server
2. adb start-server

Solution 2
Install drivers for your phone if you're not testing on emulator.

Solution 3
Open android sdk manager and install "Google USB Driver" from extras folder. (attached screenshot)

Android SDK Google USB Driver missing

Solution 4
Go to settings > Developer Options > Enable USB Debugging.
(If you don't see Developer Options, Go to Settings > About Phone > Keep tapping "Build number" until it says "You're a developer!"

Enable USB Debugging

If you installed Eclipse have Android SDK, go to DDMS. If the list device display "?????????"

you do adb kill-server and then adb start-server.

Please make sure you install USB driver and enable debug mode.

I found my solution from this similar thread by enabling USB tethering on my LG G6 (requires data saver to be turned off)

Go to: Settings -> Tethering & networks -> switch on USB tethering

I switched to a different USB port and it suddenly got recognized...

Try changing USB port. Try restarting adb server.

Just wanted to provide a simple answer here. I am just messing with an old Android device for the first time doing these root and unlock procedures. I received an error like this one when an adb push "..." "/sdcard/" command failed, and the key was that my device was in the bootloader screen. Booting to recovery then allowed me copy over the file(s), and I presume the normal OS would as well.

I had this problem suddenly crop up in Windows 7 with my Nexus One - somehow the USB drivers had been uninstalled. I ran android-sdk/SDK Manager.exe, checked Extras/Google USB Driver and installed it. Then I unplugged the phone and plugged it back in, and ran "adb devices" to confirm the phone was attached.

This doesn't work for all phones, just the ones listed here: http://developer.android.com/sdk/win-usb.html

I solved:

Just turn off USB debugging and re-enable debugging it immediately