DeviceNotRegistered Error

Please provide the following:

  1. SDK Version: 38
  2. Platforms(Android/iOS/web/all): iOS

I’m having trouble getting push notifications setup on a new project. I’m using the code here ( to get a push token on an app that I am testing on TestFlight. once the token is acquired, I alert the token so that i can test a cURL request like so (actual push token):

curl -H "Content-Type: application/json" -X POST "" -d '{
  "to": "ExponentPushToken[MPd7H8EvdaOh-JWZxuZu6HO]",
  "body": "world"

However, every time I get a new token and make a request, I get an error message:

{"data":{"status":"error","message":"\"ExponentPushToken[MPd7H8EvdaOh-JWZxuZu6HO]\" is not a registered push notification recipient","details":{"error":"DeviceNotRegistered"}}}

I’ve tried to find info on debugging this in the forums and in slack but to no avail. I’ve regenerated my certs a few different times but nothing seems to work. Any info on how to debug this would be super helpful. Thanks!