dup_hardware_revision
  
  Description:
  [ 
Version ( since = 
"1.8" ) ]
public string dup_hardware_revision ()
  
    Gets a copy of the equipment hardware revision, as reported by this Modem.
    Parameters:
    
    Returns:
    
      
        | The equipment hardware revision, or nullif none available. The returned value should be freed with 
            g_free. |