Hi there. I've had a good search around but not quite seen an answer to what I'm after. For no reason that I can fathom once or twice a day my phone goes from its normal volume to silent. I then cannot raise the volume at all using the rocker on the side. I need to turn it off and on again in order to get some volume back (hardly a speedy solution!). I presume that the fact that a restart fixes the issue (temporarily) means that it's not a hardware failure. Any thoughts? Much obliged.