I have the P905V as well.
I haven't tried a phone sim on I cant say for sure on the phone calls themselves.
however I am using a T-mobile tablet sim with text messaging and the text messaging does not seem to work on this tablet.
Verizon and sprint use CDMA for voice, SMS and 3G data
When they moved to LTE (Which is a GSM technology) they basically just added a sim card slot for data on top of the existing CDMA hardware.
Some Verizon phones also have the Sim slot enabled for GSM calling for people that travel internationally.
unfortunately most tablets (and even a lot of phones) dont have that feature and only use it for LTE
I suspect that this is the case here.
there is chance it might make calls if activated under Verizon though you would need a dialer installed. (Perhaps someone with one activated with Verizon could chime in if they have tried it)
The best option I've found on an alternate carrier is to use your google voice number in the hangouts app to make VOIP calls.
it works great for that and you basically have calling coverage anywhere you have data.
Groove IP also works pretty good and doesnt use much data.
unfortunately VOIP is the only option I know of.
On a side note, as stated above the international version has the full phone features in GSM format, this is often the case with international versions of tablets.
Sadly the US only versions often have things stripped out by the carrier, sometimes out of necessity and sometimes to push people to use their service etc.