EG912U-GL: how to enable VoLTE? IMS never registers (+CIREG: 0,0)

QuecPython
1

Hi,

I’m using an EG912U-GL (QuecPython) for a device that will be deployed in the USA, so voice calls must use VoLTE.

Thread 61755 says VoLTE has to be enabled with an AT command, but I can’t find that command in the AT Commands Manual.

Firmware: EG912UGLAAR03A01M08_OCPU_QPY

What I see:

  • The same SIM registers IMS in a phone, so VoLTE works on the SIM.
  • The module is on LTE (+COPS: 0,0,"DIALOG",7), but AT+CIREG? returns +CIREG: 0, 0.
  • I manually added and activated an IMS PDN (AT+CGDCONT=2,"IPV4V6","ims" and AT+CGACT=1,2). It got an IPv6 address, but IMS still doesn’t register.
  • AT+CEVDP? and AT+CVMOD? return +CME ERROR: 58.
  • Calls only work by falling back to 2G (CSFB).

Questions:

  1. Which AT command enables VoLTE on this module and firmware?
  2. If this firmware doesn’t support VoLTE, which firmware version does?
  3. Does the EG912U-GL support VoLTE on US carriers (AT&T, Verizon, T-Mobile)?

Thanks!

2

Dear customer

Could I check what the specific model is?

As far as I know, It seem that EG912UGL does not support Volte at present. I need to double check.

However, there is one point to clarify. When using the EG912U-GL in the USA, are you using a roaming SIM card? The EG912U-GL does not have US certification.