Originally Posted by EmilF
It looks like it is not actually dual sim, only that you can insert two sim cards, and switch between them - one active at the time. There is actually a sim switch button on the front...
It's possible the switch is there for setting which SIM card to use for outgoing
calls and messages. The phone could still very well be dual-standby or something.
Most interesting dual-SIM phone to me right now is the Samsung Galaxy Grand which is dual-sim, dual-active. Well, unless Sony makes a dual-SIM version of the Xperia Z. For me, water resistant trumps dual-active.