[iPhone 12] Can't set up dual SIM? Reasons for it being grayed out

I tried to set up "dual SIM" on my iPhone 12, but it didn't go as smoothly as I expected, and I had a bit of trouble. I wrote ...
macobserver

Can iPhone 12 use eSIM? Here’s What You Need to Know

The shift from traditional plastic SIM cards to eSIM technology has revolutionized how we connect. For users of the iPhone 12 series, understanding connectivity features is crucial, especially ...