The development of digital technologies does not stand still, and the next step was the introduction of eSIM cards. They differ significantly from conventional SIM cards and have a number of advantages. Therefore, Oppo began to actively use this technology in its smartphones. Next, we’ll look at what eSIM cards are and how to set them up on Oppo phones. Digital SIM card and its main features A local eSIM card is a module with a chip soldered into the smartphone board. Thus, it is built in there during the production process, and is not placed in the smartphone slot as a physical SIM card. The convenience is that such a card does not need to be purchased at a mobile operator’s store; it will not be lost and cannot be removed if the phone is stolen. Compared to a nano SIM card, a digital SIM card is 2 times smaller, which frees up space in the phone for manufacturers to use for other purposes. The next feature of the built-in card is that it can receive and store mobile data from a physical SIM card. That is, having saved all the necessary information on it, you can refuse the physical card, but it will also be possible to have dual SIM cards. Their work will not interfere with each other in any way. An important point is that one virtual SIM card can contain several numbers from different operators with quick switching between each other. This is ensured by the fact that the built-in card has its own operating system, microprocessor and controllers. Cellular plan information, a list of contacts, a subscriber profile, calls and messages are transferred to it. And all data, if necessary, can be retrieved and used by the subscriber. When roaming, the mobile network is quite an expensive part for travelers. You have to overpay due to the fact that the user is located outside the geographical limits of the home mobile network coverage. But having global eSIM, the phone settings allow you to connect the number of an operator in another country. Thus, only the mobile plans of local telecom operators in a particular country are paid for. If you need another mobile network operator, you don’t have to go and buy a card. All you need to do is enter the number on the built-in one from a specific operator and that’s it. Mobile phone settings and carrier support allow you to do this remotely. The principle of connecting eSIM on Oppo smartphones Many Oppo smartphone models support built-in calling card technology (Oppo Reno A, Oppo Find N2 Flip, Oppo Find X3, X5 and others). Once you make sure that your Oppo smartphone is equipped with an eSIM card, you can connect it regardless of the subscriber’s location. To do this, you need to go to the eSimsData website and do the following: select a country; decide on a mobile operator; choose a tariff plan; select a phone number; specify your email. After you make a payment (fiat or cryptocurrency), you will receive a QR code, scanning which will activate the built-in card. You can also start eSIM by clicking on the received link on your smartphone screen (the link is also duplicated to your email address). By following the simple instructions on your smartphone, you can make the necessary settings. If difficulties arise, the mobile operator that was chosen will tell you how to do it. The principle of activating and setting up the built-in card on smartphones of other phone brands will be almost the same as on Oppo models. Use the capabilities of the built-in card and use the mobile network, and the Internet will be more comfortable.