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

Question

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.

Answer 1

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.

Answer 2

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

Answer 3

Try changing USB port. Try restarting adb server.

Answer 4

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

Answer 5

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

Answer 6

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