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8x8 Support

Error 403 When Logging in on Mobile


Logging into 8x8 services via or on a mobile device results in the error message Error 403: disallowed_useragent.

Applies To

  • 8x8 Work for Mobile
  • 8x8 apps and services
  • mobile devices (Android, iOS, FireOS)


Ensure that both:

  1. A default mobile browser is configured in your device options.
  2. The browser is NOT a Mozilla Firefox browser.

Popular, supported mobile browser options include:

  • Google Chrome
  • Opera
  • Microsoft Edge
  • Samsung Internet
  • Brave
  • Vivaldi

Please refer to your device's manufacturer or OS instructions for steps on configuring the default browser.

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