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.
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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
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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
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
