title: GCM not sending or receiving - Android
body: <p>I have uploaded an .apk to the Play Store and have come across the following problem; The GCM is not sending or receiving notifications. </p>
  
  <p>When I run the app from Android Studio, the GCM works fine. It sends and receives notifications. However when I download the release version of my app to my phone, the GCM does not work. </p>
  
  <p>I have linked the sender ID in the Play Store, I have added both the release and debug SHA-1 finger prints in the console. I am unsure where else to look. The only thing I can think of is that I had to change the name of my package when I uploaded to Google Play Store and I am thinking that caused the problem because the release version of the app used to have a functioning GCM, now it doesn't. </p>
  
  <p>I have updated the package name everywhere that I can think of. How do I get GCM to work again for the release version of my app?</p>