eUICC by Watchdata is an embedded SIM (eSIM) solution that serves as a reprogrammable chip attached to the motherboard during manufacturing inside smartphones, tablets, and other connected devices. It functions as a removable SIM card, allowing information to be rewritten and updated over the air (OTA technology). eUICC complies with specifications of 3GPP, ETSI, and GSMA, providing secure service for authentication of connection to mobile networks and user identification.
