Push Tokens on Android and how to wreck them or repair them

December 2, 2025


Normally, the average Android user doesn't think about push tokens, their generation or their general function. Users normally only notice this when notifications don't come at all, come in sporadically, or show up hours too late.


When you install an app on your Android phone, a so-called FCM Token is normally generated. This token is unique and is only valid for your app and device combination. These tokens get renewed periodically. You don't have to do anything about it. This runs in the background and means no work for you.


There are certain conditions under which your token gets deleted and isn't automatically renewed. Two of these conditions are described in my other article.


  1. Deactivating the Google Play Services App
  2. Removing your Google Account from your phone


In both cases, the FCM token gets deleted. You won't notice it right away - only, when you suddenly realize tare no longer getting any push notifications.


If you did one of the two things above, you have 3three options:


  1. The apps (mostly messenger Apps) will revive themselves with a new push token, when they contact the push servers. Then, a new one gets generated.
  2. You clear the cache AND data of your app. The app stays installed, but you have to handle it like it is new, meaning: put in credentials, etc.
  3. You uninstall and reinstall the app, and a new Push token gets generated.


As I said before, many people learn this the hard way. But if you follow my instructions for reinstalling Google Play Services and avoid all those tempting options in the menu, you'll be safe and get your push notifications as usual.

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