On my LG G2 dual sim, no priority indication, no place to set sound priorities. Where is it?

[AC Question]

on LG G2 dual sim, no "priority" indication, no place to set sound priorities

LG G2 Dual sim was recently updated to Android 5.0.2. The alarm doesn't sound on silent mode, and there is no place to set the alarm as "priority" for it to sound also on silent mode.