Could you please confirm you indeed have modemmanager 0.5-0ubuntu1? Also, it might be good to look into whether your device needs a firmware update, or whether it really is supported by the changes implemented. There are so many devices, they're all different.
Having the full debug log from the point where that modem was connected will also help, since there may be some extra information about why CFUN=1 doesn't work.
Could you please confirm you indeed have modemmanager 0.5-0ubuntu1? Also, it might be good to look into whether your device needs a firmware update, or whether it really is supported by the changes implemented. There are so many devices, they're all different.
Having the full debug log from the point where that modem was connected will also help, since there may be some extra information about why CFUN=1 doesn't work.