Apple officially introduced the three new iPhones. Two of them namely the iPhone XS and iPhone XS Max are equipped with dual-SIM features.

This is the first time Apple has pinned a dual-SIM feature on their iPhone. Uniquely, Apple uses e-SIM technology for one SIM card in this feature. What exactly is e-SIM?

As we know, the Subscriber Identification Module or what we are familiar with the term "SIM card", has several types based on the size of the Nano, Micro, and standard sizes.

The most widely used today is Nano SIM because of its smaller size so it doesn't take up a lot of space on a cellphone.

At first glance e-SIM is similar to the SIM card inject system which had sprung up a few years ago. The difference is, the SIM card inject system is carried out permanently for one cellular operator while e-SIM users can still change numbers from one operator to another.

As the name implies, e-SIM alias electronic SIM does not have a physical form like a card in general. E-SIM is a module that is integrated and attached to the cellphone and cannot be removed from random.