I notice that all my music has vanished and I just have cloud download symbols. Anyone else had this issue and is there a quick way to download all the music at once (without having to click on each cloud icon individually) ?
The cloud icon next to your songs in the Music app indicates that you have iTunes Match enabled. Did you just recently enable iTunes Match? This could have lead to the "vanishing" of the music on the iPhone while it is still there but now is loaded to your iCloud account.