Originally Posted by oenone

Possibly /var/lib/ofono/ril is lacking the line

Code:

DefaultDataSim=204853412657279

where "204853412657279" is actually wherever you have in /var/lib/ofono/iccidmap as being equal to your IMSI. For example:

Code:

892475602002856046=204853412657279

Your IMSI is the long string of numbers printed on your SIM.

Or in the mobile network settings select your SIM as the data sim as it might not be selected.