hi,eperez:
You can query with the following command. If 0,0 is returned, volte is not supported (our product specification also states that BG77 volte is currently under development).
Sending this command I get “ERROR” as answer, not even “0,0”.
Please, could you indicate where can I get the latest FW for this modem? I think the one I have is out of date, and I’ve seen in some forums that the versión BG77LAR02A04 is available.
The product specs indicate that VoLTE is in supported (Cat M1) but in development. Do you know the expected delivery of the fw version supporting VoLTE?
hi,eperez:
Sorry,Currently BG77 is mainly used for data transfer in the IOT. Very few customers use volte. If you need volte urgently, you are advised to use another type of module.
I have tried to upgrade the BG77 with the QFlash utility, But we get com port error (see attached image).
We are using a UMTS<E EVB_v2.2 with an evaluation board BG77-TE-A_v1.3. We have tried both COM1 and COM2 ports in the evaluation kit.
hi,eperez:
The error message in the screenshot indicates that the serial port is incorrectly selected,Normally, there are 3 ports. You need to select the port corresponding to DM COM.Check whether the serial port is abnormal because of the driver.