But if you remove the device from the z play, you can see that there is actually room for a second sim. I would be interested to know if it would be technically possible to buy an add-on here and replace the actual SIM card device with it and then use the phone as a Dual Sim... Does anyone here know if this could work?

Is the dualsim version still not included?

Thanks for the quick reply :-) Are you planning to add the dual SIM version to the range soon or what are the prospects? I need the dual SIM. Or is the dual SIM version generally not available in Switzerland? When I read the reviews, they always mention the dual SIM, but strangely enough, only the single SIM version is sold everywhere...!

Our version has only one slot, for a SIM card.