Xperia Z2 Tablet - Is it capable of making phone calls?
According to this: http://www.modaco.com/topic/370148-mwc-2014-sony-xperia-tablet-z2-hands-on/

and on this video: http://www.youtube.com/watch?v=qJut4ZawQqw#t=172 (at 2:51)

So LTE versions are capable of making and recieving phone calls.