Under Settings > Wi-Fi > Do you have Ask to Join Networks toggled on? Your right known networks should be joined automatically. What you can try is the following, which will remove existing Wi-Fi networks and you can simply re add them.
Settings > General > Reset > Reset Network Settings -- this is a step Apple would have you try so its always worth giving it a shot. It has resolved my issues in the past.
Keeping in the WiFi loop is vital to my day, so I can only imagine how you feel with this not connecting for you. Let's make sure the settings are in the correct positions. Click this link http://vz.to/1U6MgNa to confirm the settings for your phone. Is your software up to date? Have you restarted your home router lately? We want to make sure you are all set with your connectioins and ready to enjoy the New Year.
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