I installed OpenWrt, but I don't know how to configure internet access via SIM or change the APN. Can anyone help me? I'm not an expert, so I apologize if I don't understand the steps. Thanks.
Didn't read the rest of the device wiki page https://openwrt.org/toh/zyxel/lte5398-m904#modem ?
I miss the package luci-proto-qmi
everything solved thanks to ncompact