Hi,
Everything looks good (I can ping and more via wwan interface) but I’ve an issue about integration with counters in debian buster.
They always stay to value 0 when I check with, for example, ip -s link 
(and there is no error)
All the other counters (lo0, wlan, eth, etc) grow but not wwan.
Is somebody had this issue? Is there a work around?
KR,
JiM