Hello,
I'm using the u-blox driver with a LISA-U200 modem: the modem is correctly detected, registers to the network, connects to vodafone apn and browse Internet.
My problem is that the VoiceCallManager and MessageManager interfaces are not exposed, and I need to send sms and make calls.

$ ./list-modems
[ /ublox_0 ]
    Features = net gprs sim
    Emergency = 0
    Powered = 1
    Lockdown = 0
    Interfaces = org.ofono.NetworkRegistration org.ofono.ConnectionManager org.ofono.SimManager
    Online = 1
    Model = LISA-U200
    Revision = 22.40
    Type = hardware
    Serial = 358901046388192
    Manufacturer = u-blox
    [ org.ofono.NetworkRegistration ]
        Status = registered
        Strength = 20
        Name = vodafone IT
        LocationAreaCode = 36031
        Mode = auto
        MobileCountryCode = 222
        Technology = hspa
        CellId = 10735182
        MobileNetworkCode = 10
    [ org.ofono.ConnectionManager ]
        Powered = 1
        Attached = 1
        Bearer = hspa
        Suspended = 0
        RoamingAllowed = 1
    [ org.ofono.SimManager ]
        Retries = [pin2 = 3] [puk2 = 10] [pin = 3] [puk = 10]
        MobileCountryCode = 222
        FixedDialing = 0
        SubscriberNumbers =
        PreferredLanguages = it en de fr sv
        BarredDialing = 0
        CardIdentifier = 8939103100003792186
        LockedPins =
        MobileNetworkCode = 10
        SubscriberIdentity = 222107602654388
        Present = 1
        PinRequired = none

I know that the driver was implemented for a SARA-U270 modem.

Can someone help me?

Thanks in advance,
FabioT