HD calling to Three number only works one way

[whiskerp]

Hi, I am testing calls between EE and a new Three number. I can call from Three to other providers including EE and the call is in HD (AMR-WB).

I can call from Vodafone to the Three number and it is also in HD (AMR-WB) however when I call from the EE number to the Three number the call reverts to non-HD. All my other calls from my EE phone to UK numbers are either HD (AMR-WB) or if EE->EE then in HD+ (EVS).

So why in EE -> Three reverting to  non-HD (AMR-NB 8k) ???

[bristolian]

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@354- wrote:

With 3G signal decommed in my local area; the voice calls outgoing from EE to Three still don't seem to be HD. 🤖

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EE's 3G RAN has now been decommissioned nationally, but there's no effect on the core routing of calls. IMS-based calls still get either WB-AMR (HD) or EVS (HD+) codecs, but users that would have been using 3G will now be using 2G for all calls, which uses NB codecs.

[354-]

@bristolian - thanks for sharing that information, very technical! Beyond what I know about mobile telecoms.

Who do we poke to get this looked into? EE or Three? In your opinion?

[354-]

@Christopher_G - Any news on this, was there ever a reply?

[354-]

@whiskerp - Did you ever get the HD calling to work between EE and Three?

[whiskerp]

No and I don't have a Three SIM to test it with now.

[354-]

@whiskerp - Thanks for the update!

[bristolian]

Voice calls from EE > 3 should now be in WB-AMR aka HD.

[354-]

@bristolian - I tried testing again recently, no success. Google Pixel 6 series, with an EE sim to a Nokia 4G feature phone with a 3 UK  PAYG sim. As another test, I put a Vodafone payg sim into the same Nokia 4g feature phone. On the Pixel handset, the call icon displays the HD icon when the call is connected to Vodafone, nothing for when the call is connected to 3. Have also tried from the Pixel with EE sim, to a Samsung Galaxy S2x series, that has a 3 sim; no sign of the HD call icon.

Probably best to leave it alone and it will "heal" itself, over time.