LS1012A / OK1012A EC20 GSM modem

Using Forliux OK 1012A offical cross compile environment.

Forlinx OK1012A, official image of ubuntu 18 comes with EC20 driver.

need to add a file
/et/udhcpc/default.script

Run quectel-CM V1.6.3.2

force change DNS for ping
echo "nameserver 8.8.8.8" > /etc/resolv.conf

