title: Android Studio: Android 5 lollipop can't install and launch App
body: <p>I have 2 real android devices and I used them to test my android app (I am new at Android programing)
  When I clicked "run" button, the dialog box showed me two of my devices:
  Table 4.2.2 and Cellphone 5.0
  After running, my tablet launched the app perfectly, but my phone (5.0) wouldn't launch, it even wouldn't install new app, I tried many time, and finally it run, but at the later time, I needed to remove previous app to run new app.</p>
  
  <p>Please help me to resolve this problem.</p>