Why does my iPhone 5 keep saying it can't connect to the server?

[iMore Question]

I can turn the phone off and back on and it works fine.

 

[kataran]

It's difficult to tell what is causing your issue but if it continues I would suggest you plug into iTunes and do a full restore after performing a complete back up

 

[Ledsteplin]

Try Reset Network Settings
Reset Network Settings
Settings>General>Reset>Tap Reset Network Settings. You may need to enter your wifi passcode back in afterwards.

 

[Lina Rossy]

If network settings reset wont help, try full reset... Hold the Sleep/Wake button as well as the Home button down for about 10 seconds, or until you see the Apple logo appear on your screen.

 

[bamf-hacker]

What are you doing when it is telling you that? The server you are trying to get to could be having issues.