same here. I use xperia z, before updated it worked just fine but now it's useless. I've been searching many forum but still no solution yet.
I made the mistake of trying to turn mine on after a couple of months of ownership and it seems to have messed it up. Now about every other time I put it in standby it goes dead and the opnly way to revive it is take the back cover off and unplug and replug the battery. Whenever I go into settings now the bluetooth button kinda pulses faintly.
At least SIX FREAKING MONTHS and no fix from the morons who wrote this trash????? Cripes I can get this crap from Microsoft (Even Microsoft hasn't screwed me like this) There is NO EXCUSE for this crap ... at all
Next time I buy an Apple, I was hoping Google might get it right but they are even worse than the rest. Why in the flying f--k would I buy a new Nexus next month when the morons can't even make the current one work as advertised?????