Galaxy S20, S20+, and S20 Ultra have eSIM support in most regions. But your carrier may not support eSIM on Galaxy S20.
This Galaxy S20 guide explains what eSIM is, the advantages of using eSIM on Galaxy S20, how to check eSIM support on Galaxy S20, how to add eSIM Profiles on Galaxy S20, and how to use eSIM on Galaxy S20 together with physical SIM cards.
What is eSIM?
Traditionally, you need to get a SIM card from your phone company to make and receive phone calls, send and receive text messages, and use mobile data.
The SIM card is your ID. It is unique in the whole global mobile networks. The mobile operators use the SIM card to identify the company issued the card, whether this card can connect to their network or not, and what resources (mobile plan) you can use if you can connect to the network.
As the SIM card is unique, you have to get the physical card from the carrier. When you change carrier, you cannot use the old SIM card, and you have to get a new SIM card from the new carrier.
The process can be painful. Sometimes, you have to visit a physical store and queue there for one or two hours for the tiny SIM card. Or sometimes, you have to wait a few days before it is delivered to your mailbox.
It is even more painful or some frequent travellers who prefer using a local SIM card (to avoid exacerbate roaming charges). Every time, when you reach the destination airport, you have to walk around the airport to get a local SIM card. In some countries, the SIM card sold in airports is usually not good for value.
eSIM, embedded-SIM (or more officially, embedded universal integrated circuit card, eUICC), was proposed to tackle this issue (and other provisioning issues). The standard is maintained by GSMA.
In a nutshell, eSIM is embedded storage for SIM cards in your phone. You can save each SIM card info as a Profile.
And, you can save multiple Profiles on it. GSMA does not limit the maximum Profiles you can save on one device. It is only limited by the storage capacity and the size of each Profile.
You can delete or add Profiles, which are [rovided by carriers. But you cannot modify the Profiles.
You can imagine the eSIM actually … Read the rest