I'll never buy another Sammy
My Z1 recently developed a battery fault and I needed tosend it away to Sony for repair (under warranty) I picked up a cheap 2nd hand (open box rather than "used") S4, to say it was a horrible, laggy pile of poo burdened with nasty Samsung duplication would be an understatement. I chose an S4 because I'd previously owned and liked a s2 so an s4 seemed like a bit of a no brainer.
I hated it and was so relieved to get my Sony back.