. Login. Supports dual nano-SIM cards. Only certain regions and telecom operators support. The PeaceMatrix™ content you have selected requires membership. Please sign up for membership to have access to additional content and help the PeaceMatrix™. The desire to. The PeaceMatrix™ content you have. Unauthorized for: /forums/forum/group-forums/cellulare-con-doppia-slot-umts-how-to-choose-a-safe-online-casino/. The resolution of the image taken by a smartphone is measured in megapixels, a higher megapixel count doesn't always equate to a better picture. When using both SIM card slots, either card can be set as the primary card.