Hi Zhenhua,
DUN server may create one primary context if none of contexts
existing
on the GPRS atom.
so Denis and I had a chat about this. And we agreed that oFono core
should just create one Internet context if none exists. If the plugin
driver registers a GPRS atom, we should just create one context anyway.
ConnMan requires this anyway and it makes sense. We can also go one step
ahead and fail to remove this default Internet context. It should be
present all the time.
Regards
Marcel