What does esim function mean?
The full name of eSIM card is Embedded-SIM, which means embedded SIM card. Embedded SIM card can not only directly embed the traditional SIM card into the device chip, but also save the internal space of mobile phones, smart watches and other devices without installing another SIM card.
Who invented eSIM card?
It's apples. As early as 20 1 1, Apple applied to the US Patent and Trademark Office for the patent of virtual SIM card. On September 20 14, apple released iPadAir2, which was the first time to apply eSIM card to physical products.
Since it is an embedded chip card, what should I do if I want to change the operator or number?
The eSIM card realizes the registration or change of the number through OTA over-the-air download technology. A simple description is like the current smartphone upgrade, and the manufacturer releases the OTA upgrade package. Download and upgrade and restart to get it.
Taking oppowatch3 as an example, this paper applies it to ColorOSWatch5.0 system.