Just upgraded and it says join a network? but nothing is working!

I Just upgraded my phone. Now it says join a network.  But nothing is working. What can I do?

Hi shellee58,
Welcome to the Support Communities!  The article below will help you troubleshoot the issue you are having connecting via Wi-Fi from your Macbook:
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/HT4628
Cheers,
- Judy

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