HT4623 hi my wi-fi on my Iphone not working i up date  my certificate on my laptop seens thaen my wi-fi stop working

hi i have proberm with my wi-fi in my Iphone 4s i did update my certifcate on my laptop seen then i cant use my wi-fi on my Iphone

Hi Houda mallah!
Here is an article for you that will help you troubleshoot this issue with your Wi-Fi connection on your iPhone:
iOS: Troubleshooting Wi-Fi networks and connections
http://support.apple.com/kb/TS1398
Thanks for using the Apple Support Communities. Have a good one!
-Braden

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