iPhone 12 Models in Dual SIM Mode May Not Run at 5G Speeds, At Least Initially [Update: Confirmed] - MacRumors
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Apple's iPhone 12 apparently doesn't support 5G in dual SIM mode, but a fix is coming | Mashable
Using Dual SIM with an eSIM – Apple Support (UK)
SIM Card Slot Tray Holder Single Dual SIM Card for iPhone 12/12 Mini/12 Pro Max | eBay
iPhone 12 / 12 Pro How to Insert / Remove SIM Card! - YouTube
Dual SIM for your iPhone 12 Pro Max - Buy MAGICSIM Elite