It’s simple. “Com.sec.vsim.ericssonnsds.webapp” is an app developed by Ericsson, which is pre-installed into Samsung phones.
This app is used for wi-fi calling, and should generally not be altered, deleted, or messed with.
Is com.sec.vsim.ericssonnsds.webapp Safe?
It’s completely safe, and not a virus.
If this shows up in your phone’s activity, there’s no need to worry.
Can I uninstall com.sec.vsim.ericssonnsds.webapp?
You probably can, but you shouldn’t! This is a preinstalled app that is important to the operation of your phone.
It is not recommended to uninstall.