I'm getting a "cannot connect to the server" error when I try to use Hangouts on my phone. Every other Google app works. SMS works but not Hangouts messages. All my other devices work with Hangouts messages.

  • Is the time, date, and time zone correct for its location? Maybe some failed connection is occuring because of inaccurate authentication. – wbogacz Dec 29 '14 at 16:51
  • Yes, all those are correct, wbpgacz. – JRL Dec 29 '14 at 17:24

It turns out that this issue is due to the restricted background data setting.

Navigate to Settings -> Data Usage

Find the following apps and make sure "Restrict Background Data" is switched off:

  • Hangouts app
  • Google Services
  • Google Play Store
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Go to Settings > Apps > swipe right to "All" > click the menu button of 3 vertical dots > click on "Reset app preferences".

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  • NOOO..!! If you do that you are going to RESET ALL APP PREFERENCES!! In Settings > Apps > find Hangouts app and delete data or unistal and install again – user171192 Jun 12 '16 at 11:15

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