Smartkase for iPhone 7 - Dual Sim +Memory Card +Battery Case by Fuzure Innovations LLC. — Kickstarter
Apple iPhone 8 could come with Dual-SIM support
IKOS Bluetooth Dual SIM Adapter Compatible with Apple iPhone X 8 7 6S 6 Plus iPad iPod iOS System, High Staby, Realize 2 SIM Cards Active in 1 iPhone, for Phone Calls