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I created a game in unity that I want to download on my phone. I plug in my Samsung galaxy s7 edge and click on build and run.

Build and Run

It starts building as usual, but then the error shows:

enter image description here

I don't know why this is happening. I have enabled USB debugging on my phone and did all the requirements-(click build number seven times, enable USB debugging) I also disabled and re-enabled the USB debugging but it didn't work. I even downloaded the SDK and JDK!

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  • Try disabling USB debugging and re-enabling. If you didn't also see an 'accept key' dialog on the Samsung, setup might not be complete. This very thing got me yesterday. Commented Jan 21, 2019 at 16:00
  • Yes, I tried to do that. However, the same problem shows. Commented Jan 21, 2019 at 16:02
  • also ensure that android studio is not running because it will disable adb for unity Commented Oct 21, 2019 at 18:59

1 Answer 1

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Few solutions to this problem. Someone already mentioned try plug/unplug. Sometimes you have to change option from charging to transfer files or other. Another solution that will probably work is killing adb server. Launch your OS console and type:

adb kill-server

then restart it by

adb start-server

This will force pc-phone communication to be restarted, and probably will solve your problem. Make sure the Android SDK path is correct in your Unity settings too.

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4 Comments

How do I navigate to the windows OS console?
press windows+R (will launch windows run program) type cmd and press Enter
When I do this I get this error: 'adb' is not recognized as an internal or external command, operable program or batch file.
You should have it installed on your pc, path might not be set, follow instructions here: howtodroid.com/2014/02/…

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