BB Curve :: Upgraded And LOST My WIFI

So, unfortunate circumstances for a first post here. I'm afraid my WiFi chip is dead and hoping someone can help me realize it's not.I have a Curve 9300, purchased back in April with the fabulous OS 5 on it. My husband and I bought matching phones.

Historically, I've had some WiFi issues here at my house, which could be traced back to a crappy D-Link router. Devices were being "kicked off" the network when more than two were trying to use it (xBox, phone, laptop, etc) It always seemed like my phone had the most trouble staying connected here, but it would always acknowledge that the network was there (it would show up in the list of networks most of the time), and if I went to OTHER houses or public WiFi Hot Spots, I could connect without a problem. About a week ago I upgraded to OS6 (if I had paid better attention to my software update checkboxes, I wouldn't have done it, man I hate OS6) and ever since then, my Curve won't even acknowledge the EXISTENCE of my WiFi network, even after I re-entered all the network information manually. Thinking it was our (straight-from-hell) router, I bought a new Linksys model and set it up... same problem! Since then I have tried changing every setting, manually entering network data repeatedly, even connecting with the WiFi Protected Setup button, and it's just not working. My husband's Curve, meanwhile, is connecting just fine.