wifi on board a340-600s

hi
i am flying to nyc on vs 003 and vs 026 on 28th sept/back 1st October.
do you know if either of these planes has wifi on board?
also, i am in premium on an S class fare. how would i upgrade to uppper with miles?

I am pretty sure none of the 340's have wifi and unlikely to be installed as they are gradually leaving the fleet.
S ticket upgrade is possible - to NYC will cost 10k miles and some extra tax. Need to call to set up.

Is was on vs3 and vs 4 last month both times it was dancing queen and had no wifi on board

Certainly not on Scarlet Lady.

The first A340-600 will be fitted with wifi this autumn and the rest in 2016 so doubtful will be in time for your flight I'm afraid