What is an eSIM? Here’s everything you need to know

What is esim?

eSIM is an electronic SIM card which is designed to replace the physical SIM card. An embedded-SIM (eSIM) or embedded universal integrated circuit card (eUICC) is a form of programmable SIM card that is embedded directly into a device. The outside mount format provides the same electrical interface as the full size, 2FF, and 3FF SIM cards, but is soldered to a circuit board as part of the construction process.SIM is rewritable and will be compatible with all the dominant carriers, regardless of what type of network they use. eSIM is an emerging technology that has been around for a little while, but most people don’t yet know what it’s all about.

How will eSIM work in practice?

eSIM works as similar to the physical SIM card that you are familiar with. It is embedded on the device and you just need to talk with a telecom operator to activate the card. If you have both physical and eSIM on your device, you will be able to use both SIM at the same time. When you are connected to two separate networks, your handset will display both networks on the screen at the same time.

If the phone is in standby and both the SIM and eSIM are active, you will be able to receive calls and texts on both numbers. You can choose a “default” line that you make calls on, use SMS and the other line for data.  You can store more than one eSIM on your phone, but you can use only one at a time.

Some features of eSim

You can set up a sim without the need to insert or replace a SIM card. Devices can operate independently of a tethered smartphone, with their own subscriptions. A range of new, enhanced mobile-connected devices. The number of contacts and how it works are the same as a regular SIM card, but you won’t have to bother about any foldable slots to support it. This chip is also much more reliable and less likely to cause mechanical failures.

eSIM: The SIM of the future

eSIM cards still aren’t very widely used. However, with the fact that the flagships from Apple, Google, Samsung, and even OnePlus now use the standard, we may see eSIM cards from all major manufacturers, as well as increased support from carriers in the near future. For now, in the US, AT&T, T-Mobile, and Verizon all support eSIM. In the UK, it’s just EE alone. The changing of an operator will be easier with the application of eSIM as the network data will be rewritable. You will be able to change your network operator with a single phone call rather than carrying multiple SIM cards of multiple operators.

The major advantage would be for international travelers who are spending a huge amount of cash for roaming services. This new type of SIM can be used everywhere in the world in the local network so roaming charges can get vanished.

eSIM is the only globally-backed remote SIM specification for consumer devices. This universal approach will grow the Internet of Things by allowing manufacturers to build a new range of products for global deployment based on this common embedded SIM architecture.

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