Use one phone for all your phone numbers when you have the SIMore Speed X-Four iPhone Multi-SIM Adapter Case. Going above and beyond iPhone dual SIM, the quadruple SIM design means you get access to four different SIM cards. And, because they’re all linked together, you can quickly and efficiently find the one you need. Working with both 3G and 4G SIM cards, the Speed X-Four has a spiffy connector that actually remains in the SIM tray of your iPhone. Thanks to the flexible material, the four SIM cards on the Speed X-Four can easily fold onto the back of your device, concealed by the case. Then, dialing the shortcut key on your iPhone screen, you simply choose the SIM card you want to use. Perfect for those who travel internationally or have multiple work numbers, Speed X-Four works with all iPhone models.