Spurious NotRegistered Error responses from GCM servers

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Steps-
1. Install a GCM client app on android device.
2. App should register device with GCM and send registration ID to your server.
3. Server sends push via GCM server, it works for few days/months.
4. After some days, GCM server started returning "NotRegistered".
5. Though app is still installed on that device. 

Please confirm if app should re-register a device if the version of Android OS 
it’s running has been updated.

Please also correct the documentation at below link, if required-

https://developer.android.com/google/gcm/client.html

Original issue reported on code.google.com by sachin.m...@gmail.com on 30 Oct 2014 at 11:55

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This still happens even if you re-register after the Android OS is upgraded, so 
its not just that. Also, I'm not certain its a deterministic thing, that this 
will happen every time, but it will happen reliably to many of users of an app.

Original comment by mohamed....@gmail.com on 30 Oct 2014 at 3:45

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I am also facing the same issue..it was working fine for me for a few days then 
it stopped working today...

Original comment by madhu.ch...@gmail.com on 30 Oct 2014 at 11:50

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I'm facing the same.  Any light on this?
thanks!

Original comment by nicolass...@gmail.com on 12 Jan 2015 at 6:22

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I'm also facing this problem...!

Original comment by talk2ars...@gmail.com on 16 Jan 2015 at 1:28

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facing same issue.

Original comment by surya.va...@loylty.com on 17 Feb 2015 at 6:32