Yes. We have our own cellular dialing wrapper around our own network manager code and it does this. We properly set the APN from our configuration when dialing. As I mentioned our code works on all other cellular modems.
I can’t say anything about wvdial. We are not using a standard Linux userspace – we have our own cellular interface software (and 802.11 interface, and Ethernet management, etc).
Without knowing much about wvdial: you need to AT!USBCOMP to set the right interface bits. The bits are defined in the manual. IIRC you need to enter configuration mode to change this with this command: AT!ENTERCND=“A710” But wvdial likely only requires a serial interface. AT commands will only work on one of the serial interfaces presented by the modem; try /dev/ttyUSB2. You can use a program like minicom to try to talk to the modem interactively.
But again, we know nothing about wvdial as we have our own connectivity manager written from scratch. After several weeks of analysis we believe our modem is simply faulty. Based upon the support (or lack thereof) we’ve decided to use ship a u-Blox modem with our platform instead.