What's the best module today that supports VoLTE

What’s the best module today that supports VoLTE? Preferred is a M.2 (NGFF) module.

If supported, how can the audio data be accessed?

Dear Ger,
Thanks for your inquiry in Quectel forum.
For yous question, you may can try to use EC25 in LCC form, or EG25 module in LGA form. They are all LTE CAT4 module. The following are the specs. Please check. Thanks!
Quectel_EG25-G_LTE_Standard_Specification_V1.3.pdf (726.7 KB)
Quectel_EC25_Series_LTE_Standard_Specification_V2.1.pdf (666.6 KB)
About the question that how to access the audio data, could you share more information with us? Normally, you can check the audio data via USB port and also you can refer the following Voice over USB function. Hopefully it is useful to you. Thanks!
Quectel_EC2x&EG9x_Voice_Over_USB_and_UAC_Application_Note_V1.0.pdf (411.2 KB)

Thanks for your Answer. It seems this is only available in mini PCI-e and not M.2 (NGFF), correct?
When inserted in a USB Dongle, is the audio interface then 100% accessible?
For example: https://www.aliexpress.com/item/4000683565592.html

There are also usb test boards available, like here: https://www.aliexpress.com/item/1005001469857907.html
Which version would be best for Europe with support for VoLTE?
EG25-G or EC25-E ?

Your guidance is much appreciated.

EC25-E. You can also buy it from Europe, it will come to you faster.

Thanks for your sharing @SmartEq_Bilisim . Thanks!

Thanks for the answers. Correct me when I’m wrong, but it seems EG25-G is a newer design. Why then go for EC25-E ?

I still need a way to access it through USB. I provided 2 links, which solution is preferred for VoLTE?
Other links are welcome as well.

Where can EC25-E be bought in Europe with USB interface?

What you mean with USB interface, all EC25-E has usb pin. It is module, EC25-E module.

You can contact me I can send you with DHL if you want.