"I only recommend messing with this if you see it at the top of your battery usage stats when you haven't even been making calls. Sometimes it gets 'stuck' or has a conflict with other apps like WhatsApp or Skype. A quick clear of the cache or a reinstall usually fixes the lag and gets the phone back to peak performance." Purpose: Enables and stabilizes Wi-Fi and VoLTE calls.
While it uses a small amount of power when active, it optimizes how calls are handled. By improving "call fluidity," it prevents the phone from constantly searching for a better signal, which can actually save battery life in the long run during long conversations. Should You Ever Disable or Uninstall It? comsecvsimericssonnsdswebapp android better