Do everything needed to connect the modem. Dictionary of properties needed to get the modem connected. Each implementation is free to add it's own specific key-value pairs. The predefined common ones are: 'pin' : string 'network_id' : string 'band' : uint 'network_mode' : uint 'apn' : string 'number' : string Get the modem status. Dictionary of properties. Each implementation is free to add it's own specific key-value pairs. The predefined common ones are: 'state' : uint (always) 'signal_quality' : uint (state >= registered) 'operator_code' : string (state >= registered) 'operator_name' : string (state >= registered) 'band' : uint (state >= registered) 'network_mode' : uint (state >= registered)