4.3.1 UE's usage setting

The UE's usage setting defined in 3GPP TS 24.301 [15] applies to voice capable UEs in 5GS and indicates whether the UE has preference for voice services over data services or vice-versa, where:

• voice services include IMS voice; and
• data services include any kind of user data transfer without a voice media component.

The UE's usage setting can be set to:

• "voice centric"; or
• "data centric".

If the UE is capable of S1 mode, there is a single UE's usage setting at the UE which applies to both 5GS and EPS.