Convert single SIM Samsung Galaxy S8+ to Dual SIM with Speed ZX-Twin adapter for Android - SIMore - YouTube
Dual SIM Galaxy S8+ reaches mainland Europe - GSMArena.com news
Convert single SIM Galaxy S8 Plus to Dual SIM with SIMore Speed ZX-Twin Nano SIM adapter for Android device | Transform any single SIM Samsung Galaxy S8 Plus into Dual SIM smartphone
The Samsung Galaxy S8 will support dual SIM (but yours might not) - CNET