Ok I have recently upgraded the app from C2DM to GCM. For some reason I keep getting - 'No active device tokens found for alias' intermittently. I observed it happens when you leave the phone for some time or restart the phone. When i connect the adb I can see "com.zeebox.android.caa:com.urbanairship.push.process" in the process list.
Also, Is there any limit on no. of messages a device can receive?
Any help or pointers will be useful. Thanks
Sounds like a bug with UrbanAirship, you should bring it up with them. Also you don't explain what you did when you "upgraded" to GCM. If UA is still using C2DM then you can't just switch to GCM, there are changes that need to be made on the server side (which UrbanAirship controls in this case)