The term “eSIM” basically means an embedded SIM card. It is an advanced SIM technology which is embedded in your phone to activate your mobile number. There are no physical SIM cards involved and there isn’t a need of physical swapping by you. You can have many eSims like, You can have one number for business and another number for personal use or have a data roaming SIM for use in another country. You can even have completely separate voice and data plans. eSIM needs to be supported by the network or phone and enabled by them as not all networks support eSIM as yet.
The first eSIM based phone has now been announced in the form of the Motorola Razr flip phone.
The use of eSIM brings a number of advantages to device manufacturers and customers. Since you can have plans for more than one network stored on your eSIM. One of the advantages it offers is that we should get smaller devices because there’s no need to have a physical SIM card or the tray that holds it. There’s also no need for network companies to manufacture or distribute lots of SIM cards.
Vodafone says that eSIMs will enable more connected devices simple, because eSIMs don’t require so much space inside a device, enabling fitness trackers or even glasses to have standalone 4G/5G connectivity in a way they just weren’t able before. We should see more in future, but the trend currently is surely for phones that have eSIM support alongside a standard SIM