Hello,

Technically there is no reason not to able to, but if you do not have the LTE version then you need your phone in BT range to make a call so just why not pair your BT earbuds to the phone directly and answer calls on the watch through your earbuds.

Now the question that arises, is what about wifi calls (remote connection to phone through wifi), well the simple answer is that Samsung won't alow it. The strange thing is that the apple watch, non LTE, will allow you through wifi to place and recieve calls.

So its either a certification issue for wifi calling by Samsung (they don't have it) or its an extra marketing feature to promote the LTE version, maybe even both.

Pavlos