Samsung S21 Ultra Has No HD+ Call Sound on 5G Network

[spartanmike1]

I have spent over an hour on the phone with T-Mobile and Samsung support and gotten nowhere so I will try with the knowledgeable people here.

When connected to a 5G network, my new S21 Ultra will not make calls with HD+ sound quality. During a 5G network call, the HD+ icon is not present on the call screen and looking at the Service Mode (*#0011#) invariably shows that the sound codec is "AMR:NB" which is the narrow band relatively low quality call sound. However, if I go into mobile network settings and put the phone in 4G network mode and call on a 4G network then calls do have the usual T-Mobile HD+ sound and icon present and the Service Mode shows the sound codec as "EVS:SWB", all as expected for HD+ call sound quality.

Any thoughts on what is going on with the missing HD+ call sound on 5G network? Does T-Mobile 5G, or any 5G, support HD+ call sound?

 

[Gayle Lynn]

Us a new SIM card needed? Did you rule that out?

Just guessing while doing a little googling about 5G VoLTE.

 

[mgbosshogg]

Is 5G VoLTE a thing ?

 

[shook187]

I would make sure your old phone with the same Sim works before getting bent out of shape over it.

 

[Gayle Lynn]

3G, 4G, 4G LTE and 5G VoLTE are frequently used terms associated with smartphones, but what does it all mean?

It is a service only provided over 4G and 5G LTE devices that are compatible to VoLTE.

With VoLTE, voice is sent over “packet switching”; and call quality, volume, and data speed are improved considerably.
~ Dec 10, 2018

https://gtb.net/why-gtb/blog/difference-between-3g-4g-lte-and-5g-volte-what-it-all-means

 

[PsychDoc]

Is it possible they assume that any call made or received on a 5G network is already HD+? Thus, any such additional designation would be viewed as redundant?

Just a thought.