X Series Tablets and WWAN

[ThemePark]

By looking through the X series tablets on Lenovo's website I have found that all models of the x201i, x220 and x220i come with WWAN, regardless of model number. But I have also found out that some models of x61 also come equipped with it. So I was wondering if anyone know of other tablets within the X series where at least some models have WWAN, and perhaps even what models they are?

[Puppy]

I don't think that X models prior X60/X61 were WWAN ready, see http://forum.thinkpads.com/viewtopic.php?f=2&t=84322