There are just too many factors that you need to consider. You got to be very careful while handling such issues online. In practice, both these kinds of services exist but neither is particularly easy to obtain. http://www.lg5.com/plugin.php?id=laoyang_wailian&url=aHR0cHM6Ly93d3cuS2VucG9ndXkuY29tL3BoYXNpY2tvbWJhdGl2ZXMvcHJvZmlsZS5waHA/aWQ9MjEyMDQ5OQ