2 in 1 (Q-SIM Dual SIM Card Multi-SIM Card + Plastic Case) Aftermarket product engineered to OEM specs, fits iPhone 4/4S By Online-Enterprises 100% Brand New Two SIM Cards in one mobile Auto-Switch between SIM Cards using the SIM Toolkit Application. (Located under "Applications" once installed the adapter) The new back cover for the iPhone gives it a nonslip coating and allows you to use the extra SIM easily tucked inside the cover.. Not outside as the photo is misleading. Super fast and easy returns, exchanges and refunds. Online-Enterprises Branded product.