# android building problem
**URL:** https://discussions.unity.com/t/android-building-problem/18818
**Category:** Questions & Answers
**Created:** [April 12, 2011, 2:25pm UTC](https://discussions.unity.com/t/android-building-problem/18818 "2011-04-12T14:25:48Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@anon67168765](https://discussions.unity.com/u/anon67168765)
#### Post date: [April 12, 2011, 2:25pm UTC](https://discussions.unity.com/t/android-building-problem/18818/1 "2011-04-12T14:25:48Z")
Hi everyone. I downloaded the Android SDK root folder. but when i'm build my game and after selected the Android SDK folder. the building is done. but then it gave me an error;No android device found. If you are sure the drivers is attached then it might be USB driver problem. For detail please check Android SDK Setup section in unity Manual.
What should i do? I'm using Windows.
Please help
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### Author:  [@benni05](https://discussions.unity.com/u/benni05)
#### Post date: [April 12, 2011, 6:45pm UTC](https://discussions.unity.com/t/android-building-problem/18818/2 "2011-04-12T18:45:09Z")
Have you attached an actual device (phone, tab) to your PC? Is USB Debugging switched on in the application settings of your phone, sub menu for development?
The section regarding installing an USB driver is this one:
[http://developer.android.com/sdk/win-usb.html](http://developer.android.com/sdk/win-usb.html)
Ben
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### Author:  [@Dr.damon](https://discussions.unity.com/u/Dr.damon)
#### Post date: [October 15, 2012, 8:45pm UTC](https://discussions.unity.com/t/android-building-problem/18818/3 "2012-10-15T20:45:17Z")
what happens if you are using android sdk trial???