Firebase Phone Auth Error FIRAuthErrorCodeMissingAppToken

Question

I'm getting this error from firebase when trying to sign in with a phone number on iOS

error_name: 'ERROR_MISSING_APP_TOKEN',
NSLocalizedDescription: 'There seems to be a problem with your project\'s Firebase phone number authentication set-up, please make sure to follow the instructions found at https://firebase.google.com/docs/auth/ios/phone-auth' },
domain: 'FIRAuthErrorDomain'

I've followed all the linked directions ( https://firebase.google.com/docs/auth/ios/phone-auth ) to enable phone authentication and add APNs Keys, etc.

What "token" is missing to cause this error?

Thanks.

Answer 1

We were having the same problem. Turns out we should have used a real device with a working SIM card inside . Try it out. Hope it helps.

Answer 2

It looks like the answer was pretty simple, I was using an outdated version of the Firebase iOS components. I updated my Podfile and installed the newest version and everything started working.