About Push notification with google play services issue

Question

I encounter the problem with Push notification below:

On 1 phone, I'm receiving push notification well. I delete google play service, after install latest version of google play services then I can not receive push. Now I installed old version of google play service, but I also can not receive push on this phone. Do you know about this issue?

I tried with demo code of google here It don't work on this phone.

Answer 1

Because Token is generated when google play services installed on device so when you uninstall the google play services and reinstall new version then you have to get token then only you receive push notification.