eSIM is truly an amazing SIM card technology. You do not have to insert a physical SIM card to make a phone call if the phone is eSIM supported. But this technology is not in all phones. It can be seen on a handful of phones. The Oppo A55s is one of those phones that does not support eSIM.
Oppo A55s is a smartphone full of various interesting features. However, this phone does not support eSIM technology. You need to communicate using a physical SIM card. You will get full specifications about this phone on our site. You can visit it if you want.