First, can you provide us with details of what version of Ubuntu you're running. If you can access adb, you can get detailed information from the command 'system-image-cli -i'. If not, please grab the version from "About this phone / Software / OS". Ex. 15.04 (r23).
Again, if you can use adb, please post the output of /usr/share/ofono/scripts/list-modems, and /usr/share/ofono/scripts/list-contexts. If not, could you attach a screenshot of the Cellular Settings?
If you can only use your Ukranian SIM for data when not-roaming, have you tried to select the other SIM for mobile data?
@Michael
Somehow my comment from yesterday was lost...
First, can you provide us with details of what version of Ubuntu you're running. If you can access adb, you can get detailed information from the command 'system-image-cli -i'. If not, please grab the version from "About this phone / Software / OS". Ex. 15.04 (r23).
Again, if you can use adb, please post the output of /usr/share/ ofono/scripts/ list-modems, and /usr/share/ ofono/scripts/ list-contexts. If not, could you attach a screenshot of the Cellular Settings?
If you can only use your Ukranian SIM for data when not-roaming, have you tried to select the other SIM for mobile data?