QUECTEL EC20/EC21. Several drivers supported, which one is better to use?

[José]

Hi,

I am planning to test ModemManager with QUECTEL EC20 and EC21 cellular
modems. These modems support the following drivers:
* USB Serial (option.c)
* CDC ACM
* GobiNet
* QMI WWAN

What is the best approach for trying to use ModemManager? Should I
enable all drivers? Only the newest/more advanced one?

Could you recommend which one of those to enable? Thanks