title: Android Studio - Don't notice phone
body: <p>Welcome , I've a problem with Android Studio , i don't know why but the program can't find my phone , that obviusly happens when i try to test a program directly to my phone , i just can't find the dispositive into the the Android Device Manager.
  I have a Samsung S3 , I'd setted the same Android version into the program ( same of my phone Android 4.0.4) , i'd eneble the "USB debugging" into my phone , but the program can't find the dispositive .
  I'd tried to change the computer and than the problem didn't verified . 
  My pc find the phone correctly it is a problem of the program. Do you have any solution ? thank you</p>