After updating to H90120j, every time I make a call over VoLTE, my phone is silent until the other party or their voicemail picks up. If I'm on HSPA or lower, my phone rings in my ear when I make a call. If I am on LTE and disable VoLTE, it rings in my ear when I make a call. This only occured after updating, and I've tried a factory reset.
It is extremely annoying because I never know if my call is actually going out or not.