Fibocom FM350-GL Support

I create a dynamic DHCPv6 interface, but I have to add the DNSs manually.
The DNS addresses needs to be converted to HEX-format.

here is tutorial about FM350-GL

Does anyone here had issues with mtk7xx driver and modemmanager crash/kernel panic?. After the crash openwrt restart then cannot access luci anymore. i had to power off than power on back. The issues liked this.