Thanks to innovative technologies, the functionality and capabilities of gadgets are increasing. Currently, smartphones are the most popular mobile devices. And some features that seemed impossible a few years ago are becoming a reality today. Therefore, today, a smartphone is a mini-computer in your pocket for work, study, and personal purposes. General information about the eSIM card To make calls, write messages, and connect to the Internet, you will need a SIM card. It fits into a smartphone slot. This card has evolved over the years and has become many times smaller than its original dimensions. In addition, it has reached a new functional level. But this is a physical card you must purchase and insert into the slot yourself. An alternative is a built-in SIM card with the following advantages: it takes up half the space of the minor nano embedded SIM card; it does not require a slot (it is already built inside the smartphone initially); there is no need to change it; remote preparation of a SIM card is possible; if the phone is stolen, it will not be possible to remove it to change the phone number. Thanks to the introduction of eSIM, manufacturers can produce monolithic smartphones without providing a slot for installing a card. Based on this, the prospects for using built-in calling cards are excellent. Currently, Apple’s cellular devices use built-in calling cards. Therefore, the further we go, the more other smartphone manufacturers will begin to implement this technology and enter the global market actively. Digital SIM card and how it works Digital eSIM is a card built into the smartphone (it is soldered to the board). It is the main difference from traditional SIM cards for phones. Thanks to this innovative solution, it is now possible to solve many of the problems associated with the space that had to be provided for manually inserted calling cards. Considering that in the future, almost all gadgets will have wireless charging and headphones, smartphones will only need a hole for speakers. In this way, it will be possible to produce monolithic enclosures without additional costs. The nature of the built-in card is similar to a bank card, which stores the necessary data, which is read when necessary. A global SIM card works on the same principle: it includes mobile network operators, phone number, tariffs, and other essential information. The eSIM card has a microprocessor, memory, controllers, and a simplified custom operating system. Thanks to this, it can store data and, if necessary, you can change the tariff and telecom operator. It is worth noting that people who make a subscription can use up to five phone numbers using the built-in card. Switching between numbers will be convenient and fast. It will be especially highly appreciated not only by travelers but also by people who need to use many numbers and different operators—roaming implies additional financial costs for mobile communications. But the presence of a built-in card excludes this. It is enough to connect a new number of local operators for the required time and pay significantly less for communication. If your smartphone supports this innovative solution, then the eSimsData website allows you to purchase this option. You will need to spend a few minutes and use the QR code (or the link received by email) to do remote SIM provisioning.