Has anyone tested their iPhone 5's cellular antenna strength compared to the 4S? My 4S was rock solid inside my parents' house despite being limited to 1 to 2 bars, while my 5 either has 1 bar or No Service. Also, I can't connect to the Wi-Fi in their house when I'm in another level of the house with my 5, while I could with my 4S. I've also noticed bouts of "No Service" or lower service inside buildings with my 5 that were non-issues with my 4S, so I know it's not a carrier issue. Anyone else experience this or is this a design flaw in my iPhone 5?