iphone 4 wifi having problems finding wireless networks

iPhone 4 WiFi having problems finding wireless networks
location: macrumors.com - date: January 11, 2011
My iphone 4 can connect to my mytouch 4g's hotspot connection just fine but cannot FIND my home network along with other home/public networks. when i turn on my mytouch 4g's hotspot the iphone connects to it automatically (remembers the password etc) and browses the web, app store etc with no problems. BUT, it will not find my home wifi. it is not hidden. i have typed my home networks name in and entered the password and the iphone still says it cannot find the network. my mytouch and macbook along with every other device in my house have no problems. why would the iphone find my mytouch wifi hotspot and not home network? would replacing the wifi antenna be a solution? any ideas? (i've rest iphone's network settings)
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