Information / Solution
You might experience that you can’t use two SIM cards and one memory card at the same time in some Xperia devices. This is because the hybrid SIM tray/trays that is used in these devices only allow you to either insert an additional SIM card or a memory card.
The hybrid SIM tray occupies less space. If you want to use two SIM cards, it’s not possible to expand the storage of the device using a memory card.