Can you link the video? I haven't seen a US 9 pro teardown vid yet. There's been multiple accounts of people with the device saying the 2nd set of SIM pins are in the slot, just not enabled in software.I search around and found that iphone US version are also single sim and they are able to make it to dual sim only if they open the phone and replace the actualy sim inserted piece on the motherboard. I watched the tear apart video of oneplus 9 pro which the sim card piece on the motherboard is also detachable without remove the whole motherboard. I think the would work. Simply use a dual sim tray would not work.