I tried to re-install Pokemon Go and I keep getting "authentication error. must sign in to Google account." I'm signed into my Google account. I am logged into my Pokemon Go account at Pokemon.com. I had the app installed on my one previously, then it stopped working I kept getting a retry message. So, I deleted it to start over. Obviously that did no good, and just made it worse. I've looked at many of the Q&A on the internet and nothing resolves my issue. Same with going to Niantic. Any answers?

  • Niantic has troubleshooting guides for both Android and iOS. They have worked for me when I get the retry message.
    – Jerry
    Commented Feb 17, 2019 at 11:59
  • What android version you are using on your phone ? ( in case you are using an android phone )
    – B.M
    Commented Feb 21, 2019 at 15:16

1 Answer 1


As Jerry commented on the question:

Niantic has troubleshooting guides for both Android and iOS.

Common checklist:

  1. Try cleaning the app data and log in
  2. Do clean uninstall (quit app, clear data, uninstall)
  3. Reboot phone
  4. Reinstall
  5. Sometimes it's a server side thing and you have to wait

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