For the last couple days, voice dictation and Siri won't fuction, nor will any updates from the iTunes Store go past "waiting." Everything else functions, including Safari, both 3G and Wifi. I have turned the 4S off and back on to no avail. This is a replacement Apple gave me when my original broke, and I wonder if I'm experiencing the joy of "factory refurb." Anyone else have these issues or know a fix?