update 12.1.1
Since the last update my 64gb iPhone 4s has lost half of my music library because 'OTHER' is taking up 31.23gb of space. What is 'other'? I play music EVERYDAY from my phone and I'm really fed up that Apple aren't checking updates thoroughly enough before releasing them. Apple products are popular because 'they work'! It won't take long to lose that reputation with updates like the last one. PLEASE FIX IT.
iPhone 4S, iOS 8.1.3