Default No 3G calls

Hey guys. Totally in love with my Z1 international*version but was really sad to see that this phone has no native 3G calling , Im not talking about Skype or some app..rather the old school video calling ...All my Samsungs including the Note 3 have the ability to do this...is there some way to get it on the Z1?
Crash ROM 3.7
Awesomeness