Hi Marcel, 

> so what about the cases when roaming is allowed or not? These needs to
> be taken into account and that is oFono's job. That is the reason why
> ConnMan follows the attach state. Since we don't wanna activate a
> context when roaming and data roaming is not allowed.

Ok, I see the concern. I'd propose making GPRS availability a separate property 
from GPRS attach status. Availability can be decided on registration status 
alone (i.e., does the network advertise GPRS and does the roaming check allow 
GPRS). Both GPRS attach and PDP context activation can in any case fail for 
transient reasons, so ConnMan needs to have some logic to retry context 
activation.

Br,

        MikaL
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