How eSIM Technology Works: A Simple Guide

Look at how DVDs became Netflix or how we transitioned from a key to a smart door lock. You didn’t lose access to your movies or your door; you just eliminated the intermediary.

This is exactly what's happening to the tiny plastic SIM card you have in your phone.

If you are about to travel, then learning about eSIM technology is the best way to avoid the expensive roaming and hassle at the airport. Let’s have this simple, straightforward explanation of eSIM technology and how to use it with SIMZY Travel eSIM.

What is eSIM?

eSIM (short for embedded Subscriber Identity Module) is a tiny programmable chip that’s integrated into your phone.

In simple words, this means that your phone supports the required technology, and instead of taking the little paper clip and putting the plastic inside your phone, you only need to download the profile over the air.

How does eSIM technology actually work?

Picture a traditional Travel SIM card as a physical key at a hotel door- you need to take it out, carry it with you, and exchange it when changing rooms. However, an eSIM differs in a way that it can be compared to a digital key which is sent to your smartphone app directly. In both cases, the lock stays the same, but the digital key can change almost instantly.

Now, let us find out how it all works:

1. The eUICC Chip: This chip is physically soldered to the phone's motherboard.

In simpler terms, it is an empty container inside the phone's motherboard waiting for its network information.

2. The eSIM Profile: It is a digital file containing information about the mobile plan, phone number, and the user's credentials.

In simpler words, the eSIM profile is a "pass" with user's information printed on it so that local cell towers can use it to recognize the person.

3. Remote Provisioning: It is the process through which the carrier transmits the necessary information to the phone through the internet connection.

In simpler terms, it can be compared to downloading a song from Spotify instead of buying a CD.

Why are eSIMs perfect for modern travellers?

No matter where you're travelling, be it Europe with SIMZY's 41 countries or any of the more than 220 destinations around the globe, eSIM technology makes it easier for you to be connected.

No More Physical Changes: Forget about needing to look for your tiny SIM card that could fall on the ground or even lose your home SIM while you're on the trip.

Dual-SIM Capable: You can carry two SIM cards simultaneously. Now you can get cheap local data from SIMZY while still having your home number for calls, messages, or bank codes.

Get the eSIM now and activate it later: You can buy the eSIM plan, scan its code at home, and set an activation date. As soon as your plane lands, the eSIM connects.

How to Activate a SIMZY eSIM in 3 Simple Steps

Connecting to the Internet is faster than ordering coffee

Step 1: Choose your plan: Visit the destination of your choice, and select a Data Only plan, or a Data plus Calls and Texts option depending on how long your trip will be.

Step 2: Scan the QR Code. In your phone settings, click on cellular/mobile data. Then click Add Travel eSIM and point the camera to the QR code you received in your email.

Step 3: Connect to local data. As soon as you arrive at your destination, advise your second SIMZY line to connect to the internet. Your phone will automatically start working with the existing 4G and 5G internet data.

Is your phone ready for eSIM?

Most of the smartphones made in the last several years, including but not limited to iPhones XS and newer, Samsung Galaxy S20 series and newer, as well as Google Pixel 3 and newer have their own eSIM chips.

With this setup, you miss the long lines at the airport and have high-speed internet data everywhere.