iPhone 4s; wifi still not working after 8.1 upgrade

Got really excited this morning when I heard a new updated was going to be released. My 4s could not connect to wifi networks after iOS 8 upgrade. Went to multiple genius appointments and reset my network settings many times. Wifi will sometimes work for a hot minute after resetting network but always crumbles into ashes. Even restored my phone to factory. I just upgraded to iOS 8.1 and I still have the same issues. Apple store people wanted me to buy a new phone... They verified my wifi card was working, too. Come on Apple.