The primary purpose of com.sec.vsim.ericssonnsds.webapp is to act as a bridge between the Android OS and the Ericsson modem hardware to facilitate .

Yes. It’s a legitimate part of the Android framework on certain Samsung phones, especially those sold through carriers that use Ericsson’s network infrastructure. It is not malware or bloatware in the malicious sense, though you may not be able to uninstall it without root access.

: It enables your device to establish and maintain phone calls over Wi-Fi networks when cellular signal is weak or unavailable.

The application package is a system application found on Samsung Galaxy devices. It is a core component supporting the eSIM (Embedded SIM) functionality on specific devices that utilize Ericsson hardware or modem technology for connectivity.

Here’s a draft for a post regarding :

High Battery Usage: If you are in an area with poor cellular reception, this service may constantly try to "hand over" calls between Wi-Fi and LTE, leading to increased battery consumption.