GLI MiFi and Quectel EC25 4G modem

I have some issue to get the above modem recognized by the LEDE/Openwrt.

Everything seems to work fine, but the wwan or any other possible 4G device doesn't show in the /dev/ directory

It's the first time I try to get a 4G on a OpenWRT/LEDE firmare and don't really know where to look to troubleshoot.

Any clue or howto? Missing module/package on the vanilla firmware for that device? I have used the binary from the LEDE repo and also compiled the LEDE/OpenWRT sources from the manufacturer repo( )