As you are already bald to know, one of the good news of this year's iPhones supports Dual SIM. We explain here in detail how the technology works, and already d to play with it in Brazil by the My Truphone or GigSky apps since, at the moment, no national operator supports eSIM.
But some must remember that, in China (more precisely in mainland China, Hong Kong and Macau), Apple created a different version of iPhones with a double tray for chips ie, there they do not use eSIM. With a detail: only the iPhones XS Max and XR have this double tray, the iPhone XS no.
That is, considering the limited reach of eSIM technology not only in Brazil, but worldwide, the Chinese XS Max and XR iPhones have the great advantage of allowing the use of Dual SIM anywhere. Just place the two physical chips in the tray, one on top of the other.
Apple probably followed this path in China because it knows that, for now, eSIM technology must still take many years to become reality. In the rest of the world, however, the implementation on iPhones may, or rather, is already accelerating the adoption of it by operators. Apple's classic way of stimulating the expansion of certain technological innovations.
Our reader Bruno Boehm was happy to buy an iPhone XS Max in Hong Kong and shared photos and information with us.
As you can see from the photos above, on one side the tray is similar to the one we know. On the other, it also has space for a chip but has a "soft" that holds it in place to make it easier to put it back inside the iPhone.
With the two Nano-SIMs inserted in the iPhone, the operation of the feature is basically the same when the eSIM is activated next to the physical chip in other countries.
In the initial configuration wizard, the user defines a Tag (name) for each line and determines which of the two will be the default, that is, the one used for iMessage and which will be used primarily when sending SMSs or making calls. You can individually choose the preferred line for each of your contacts.
Obviously, none of these adjustments are final. Afterwards, the user can change whatever he wants, such as reversing the lines, choosing which one will be used by default for voice calls and which one will be used for cellular data. The cool thing is that you can even activate a function that switches cellular data to the line being used for voice.
Despite this great advantage of the Chinese XS Max / XR iPhones, it is worth noting that the models sold by there, like the Americans, do not support our 28 band (700MHz APT). 4G will work in Brazil, but in some places the signal may not be very good and the absence of this band prevents the operation of 4.5G.
Apple gives all the details about using Dual SIM with two physical chips in this support article.