iPhone 4s - Apps Won't Update
Disclaimer: I have searched for answers to my particular problem, but either a) the problems aren't the same or b) there's still no answer to problems that are even remotely similar.
I have an iPhone 4s that I sync via iCloud and/or with my MacBook Air, and all devices have the latest software updates. Here's the problem: just yesterday, my iPhone lost the ability to update apps. I'll go to the App Store on my device to check for updates and see one or two or however many...I'll hit the update button, enter my password, and then the app icons turn grey like normal, with the empty progress bar underneath. The problem, however, is that nothing happens past that. The icons remain greyed out, with an empty progress bar underneath and the apps never update.
I've tried updating over different WiFi networks as well as over 3G, yet nothing works. I can update the apps on my MacBook Air, but it doesn't even work when I plug my device directly into the Air. The same apps still need updating on my iPhone. I've tried resetting my iPhone via the normal two methods, and the problem still persists. And additionally, my iPhone keeps randomly popping up the iTunes password box on my screen. This usually happens at some point after I've attempted to update an app, gotten frustrated because it won't update, and then reset my phone.
Any help would be much appreciated.
iPhone 4S, iOS 5.0.1