I've gotten it twice now - both times it happened were in areas of really spotty wireless service. First time it happened, restarting the phone in an area with better reception worked, second time I waited about an hour and tried again when I had better service. I use Google to login and it might be because it tried and failed too many times in a short period of time, but that's just speculation. I have an iPhone 6.
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Unable to authenticate error
Anyone having issue after recent update? I keep getting "unable to authenticate. Please try again". I can log on fine using my wife's phone. I uninstalled, reinstalled, rebooted after installation, cleared cache and data, issue persists. I was thinking the update rendered my device obsolete, but then why does niantic allow installation. I should get device not supported if that is the case.
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Pokemon app was using google authenticator to contact playstore.google.com, this service was corrupted, that's why rebooting, cleared cache, reinstalled didn't work. Internet connection was not the issue since I was using solid wifi and/or mobile data connections at the time. I was able to play the game until pokemon go force update, so the update must have corrupted some system files. I had no choice but to reset the phone to factory default, and reinstalled everything. Things are now working again.
