IPhone 4 will not display home Wi-Fi?

My iPhone 4 has recently stopped displaying my home Wi-Fi network. I can use 3G just fine, but I have limited data. Everybody else in my family can use the Wi-Fi on their iPhones just fine, it's only mine that seems to be a problem. I've tried rebooting the phone, clearing my network settings, restoring the phone, manually entering the Wi-Fi info, etc. Does anybody know a definite way to solve this?

Added (1). The Wi-Fi is on, airplane mode is off, and everything is in working order, except for the fact that I can't find my home Wi-Fi connection and my Safari bookmarks are all gone.

Check and make sure you have Wi-Fi on under settings, if you don't that would be why it is not showing it, either that or you have airplane mode turned on, or your phone is just screwed up in that case, you should probably call apple