Has anyone else noticed that the 4S wifi isn't as good as it was previously on the iPhone 4? Now in certain areas in my home where I previously used wifi on my 4 became unusable on the 4S. The 4S doesn't seem to have as long a range as the 4. This is the case with 3 different 4Ses ive tried and my network setup has not been messed with or changed in any. Anyone experiencing what I'm noticing for the wifi?