One of the highly-requested features for the iPhones is dual SIM, which Apple finally brought to the table with the iPhone Xs and Xs Max. However it seems that dual SIM isn’t quite ready yet as it seems that it will need to wait for the iOS 12.1 update before it is enabled, which means that you shouldn’t expect dual SIM support out of the box.
That being said, it should be noted that it isn’t quite as easy to get dual SIM functionality as you might think. For starters users will need to activate the eSIM on their iPhones once the iOS 12.1 update is released, which means you’ll have to scan a QR code or add additional information from your carrier before you can activate it, so even then you’ll need to go through additional steps.
This is mostly due to the fact that the new iPhones rely on an eSIM and physical SIM combination, whereas other phones have typically relied on dual physical SIM cards in which it is mostly a plug and play affair. However as is the case with new technology, it will be a tad cumbersome at the start.
There have been some who claim that Apple will help to boost adoption of eSIM technology due to the popularity of its iPhones. Whether or not that is true remains to be seen, but for the most part a lot of the world still relies on physical SIMs and it will probably be a while before we see eSIMs adopted. China’s version of the new iPhones will be the exception as they will support dual physical SIMs.