I've seen this firmware bug before. AT&T uses the default eps bearer for
Internet connectivity and the default setting in quectel's firmware is
incorrect for most subscriptions.
Setting the default bearer apn to an empty string before enabling the modem
fixed this for me.
On Tue, Apr 23, 2024, 09
Hi Bruce,
You can use ModemManager's API to set APN. ModemManager will do it using
QMI protocol and there should be no need to send additional AT
command unless you're doing something more custom not handled by
ModemManager.
I've been using Quectel (EG/EC) modems over USB with ModemManager and as
