Goodbye SIM Card. Embedded SIM will come in handy...Tech

By Maduranga Jayasinghe | 2017, October 05  Views : 1254

මෙම පිටුව යාවත්කාලීන කරමින් පවතී...

While mobile phones have come to a long journey over the years, There's one thing that hasn't changed yet. Whatever the sophisticated mobile phone on your hand, you have to insert a physical SIM card which your preferred service carrier provided in order to get its service. You have to go to the service provider store to get a SIM card for the mobile service or if you have ordered it over the internet, you would have to wait a few days for your card to arrive in the mail and need to search paper clip to take out your sim card from the tiny slot.

So, This is the high time to say goodbye to your traditional SIM card. Because eSIM will come in handy.

Evolution of SIM card

What is SIM card ?

The first SIM card was created in 1991, and these devices quickly became a significant part of GSM networks. The cards are based on integrated circuits called subscriber identity modules, hence the name as SIM.

These SIM modules store information required for authentication, allowing a user's phone to attach to a GSM network. Each card has a serial number as well as network information, and users can remove the card from one phone and install it in a new one without registering the device if need be.

This module also stores your personal phone directories, messages, information on roaming across different networks and many other value-added data and voice services. You're able to instantly access news, chat and other value-added services along with mobile SIM application. It is not restricted by any handset make which enables operators to reach all of their customers.

What is eSIM ?

The embedded SIM (also called eSIM or eUICC) is a new secure element designed to remotely manage multiple mobile network operator subscriptions and be compliant with GSMA specifications.

It will come in the form of an integrated SIM chip that cannot and need not be removed from the device. The information on eSIM can be retrieved or rewritten by all operators. Then, You can change the operator with a simple phone call or SMS and a new SIM will not be required and there's no any time delay in switching operators.

If you have an eSIM supported mobile device and has connected to the Internet via Wi-Fi, your service provider can update your eSIM information activate the service within a second.


Yesterday, Google unveiled there new Google Pixel2 mobile phone is the first to use built-in eSIM technology. As long as you're a Project-Fi subscriber, Google will use the devices' built-in eSIMs to authenticate your cellular account.

The same Apple Watch 3 can be used by Verizon, T-Mobile or Sprint in the US. Only EE currently offers the Apple Watch 3 in the UK, so network switching isn't an issue.

One of the most interesting aspects of the Watch 3's eSIM is that it'll share your iPhone's number. You can think of them as part of the same connection. However, this also means it'll only work with an iPhone and that your iPhone and Apple Watch will have to be with the same network provider.

The future of eSIMs

The network data that a standard SIM card carries will be rewritable on future eSIM devices, so all you'll need to do to change the operator to make a phone call, rather like when you arrange to bring your phone number across to a new network now (though hopefully even easier).

Another advantage will be when travelling. It will be much easier to switch to a local network if you're going to be spending any great amount of time abroad.The other problem with physical SIM cards is that there are currently two or three sizes in play.

Traditional SIM card


eSIM has already been standardized by GSM Alliance, and a number of major carriers voiced their support for the new technology, including AT&T, Deutsche Telekom, Etisalat, Hutchison Whampoa, Orange, Telefonica and Vodafone.

However, with all due respect to eSIM's benefits, the migration won't happen overnight. Smart Insights forecasts the sales of eSIM-enabled handsets would total 346 to 864 million units by 2020. Obviously, it's a very conservative forecast, and the industry support does not equal adoption. Regular SIM cards are well alive and kicking: by the end of the decade, their sales are expected to drop just 16%.