How does a UE successfully use VoLTE services with MNO network?

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How does a UE successfully use VoLTE services with MNO network?

How do MNOs become qualified for providing VoLTE services?

As a crucial role in this process, a mobile network operator (MNO) is a telecoms entity that controls all the elements including radio spectrum allocation, wireless network infrastructure and other necessary components, providing wireless voice and data services to mobile phone subscribers.

A new MNO needs to become a GSMA member before launch.The application documents include IR.21, IR.85..etc. The MNO must apply and pass GSMA testing for certificate of VoLTE capability. The baseline document is GSMA IR. 25.
PS: GSMA will update membership list globally.

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