Your push send returns 404 UNREGISTERED, “Requested entity was not found” or messaging/registration-token-not-registered. The message didn't fail because of your payload: FCM is telling you that devic
Your push send fails with 403 SENDER_ID_MISMATCH, or the Node.js Admin SDK throws messaging/mismatched-credential. The token isn't dead. Your server is sending from a different Firebase project than t
You set up Firebase Cloud Messaging, it works on Android, and on iOS the app throws No APNS token specified before fetching FCM Token. Here's what the error actually means and how to fix it in React N
