1) List the modem (note no pin is required)

/tmp # ./list-modems
[ /huawei0 ]
    Features = gprs cbs net ussd sms rat sim 
    Powered = 1
    Lockdown = 0
    Interfaces = org.ofono.ConnectionManager org.ofono.CellBroadcast org.ofono.NetworkRegistration org.ofono.SupplementaryServices org.ofono.CallBarring org.ofono.CallSettings org.ofono.CallForwarding org.ofono.MessageWaiting org.ofono.SmartMessaging org.ofono.PushNotification org.ofono.MessageManager org.ofono.RadioSettings org.ofono.AudioSettings org.ofono.VoiceCallManager org.ofono.SimManager 
    Online = 1
    Model = E1692
    Manufacturer = huawei
    Serial = 353108032160081
    Revision = 11.126.08.00.192
    [ org.ofono.ConnectionManager ]
        Powered = 1
        Attached = 1
        Bearer = none
        Suspended = 0
        RoamingAllowed = 0
    [ org.ofono.CellBroadcast ]
        Topics = 
        Powered = 1
    [ org.ofono.NetworkRegistration ]
        Status = registered
        Strength = 41
        Name = Telecom Italia M
        LocationAreaCode = 61108
        Mode = auto
        MobileCountryCode = 222
        CellId = 72657880
        MobileNetworkCode = 01
    [ org.ofono.SupplementaryServices ]
        State = idle
    [ org.ofono.CallBarring ]
        VoiceOutgoing = disabled
        VoiceIncoming = disabled
    [ org.ofono.CallSettings ]
        HideCallerId = default
        CallingLinePresentation = enabled
        VoiceCallWaiting = disabled
        CalledLinePresentation = disabled
        ConnectedLineRestriction = unknown
        ConnectedLinePresentation = disabled
        CallingLineRestriction = off
        CallingNamePresentation = unknown
    [ org.ofono.CallForwarding ]
        ForwardingFlagOnSim = 0
        VoiceNoReplyTimeout = 20
        VoiceNotReachable = +39363338585692
        VoiceBusy = +39363338585692
        VoiceNoReply = +39363338585692
        VoiceUnconditional = 
    [ org.ofono.MessageWaiting ]
        VoicemailMessageCount = 0
        VoicemailMailboxNumber = 
        VoicemailWaiting = 0
    [ org.ofono.SmartMessaging ]
    [ org.ofono.PushNotification ]
    [ org.ofono.MessageManager ]
        Alphabet = default
        UseDeliveryReports = 0
        Bearer = cs-preferred
        ServiceCenterAddress = +393359609600
    [ org.ofono.RadioSettings ]
        UmtsBand = any
        TechnologyPreference = any
        GsmBand = any
    [ org.ofono.AudioSettings ]
        Active = 0
    [ org.ofono.VoiceCallManager ]
        EmergencyNumbers = 112 911 
    [ org.ofono.SimManager ]
        Retries = [pin2 = 3] [puk2 = 10] [pin = 3] [puk = 10] 
        MobileCountryCode = 222
        FixedDialing = 0
        SubscriberNumbers = 3338585692 
        PreferredLanguages = it en 
        BarredDialing = 0
        ServiceNumbers = [12.54] = '1254' [MilleunaTIM] = '40848' [Disattiva Segr] = '##002#' [TIM Taxi] = '42494' [Serv. Clienti] = '+393399119' [Segreteria Tel] = '41919' [Avv Chiam NO] = '#43#' [Attiva Segr.] = '**62*41919#' [Avv Chiam SI] = '*43#' 
        CardIdentifier = 89390100001387706456
        LockedPins = 
        MobileNetworkCode = 01
        SubscriberIdentity = 222019903120772
        Present = 1
        PinRequired = none

2) Enable the modem

/tmp # ./enable-modem 
Connecting modem /huawei0...
/tmp # ./online-modem 
Setting modem /huawei0 online...
/tmp # 

2 Bis) List context

/tmp # ./list-contexts 
[ /huawei0 ]
    [ /huawei0/context1 ]
        Username = 
        Protocol = ip
        Name = Internet
        Settings = { }
        IPv6.Settings = { }
        Active = 0
        AccessPointName = ibox.tim.it
        Password = 
        Type = internet

3) Setting the apn 

dbus-send --system --print-reply --reply-timeout=120000 --type=method_call --dest='org.ofono' /huawei0/context1 org.ofono.ConnectionContext.SetProperty string:AccessPoint
Name variant:string:ibox.tim.it
method return sender=:1.9 -> dest=:1.14 reply_serial=2

4) Activate the context
/tmp # dbus-send --system --print-reply --reply-timeout=120000 --type=method_call --dest='org.ofono' /huawei0/context1  org.ofono.ConnectionContext.SetProperty string:Active variant:boolean:true
Error org.ofono.Error.NotImplemented: Implementation not provided

4 Bis) Activate the context
/tmp # ./activate-context 
Error activating /huawei0/context1: org.ofono.Error.NotImplemented: Implementation not provided
/tmp #