LTE voice call follow the cuircuit switch path or packet switch path

Question

Since the LTE networks are usually evolved from a GSM or CDMA network with a circuit-switched path, are calls from LTE-capable handsets still prioritized on the circuit and then thrown on the packet-switched route for a VOIP call if that path is full? Or is it the other way around.

Answer 1

I think it will be a phone setting. I would imagine, by default it should route to PS domain, only in case where there is no 3G/4G coverage it would fallback to CS.