Faster than light communication is not possible. If I measure the polarization of an entangled photon and it turns out to be right circularly polarized. In that instant, dont I know that someone measuring the polarization of the other photon will find a left circularly polarized photon. Surely, I have just gained a piece of information, namely that my friend will see a left circularly polarized photon, and he knows I have the opposite. How is this not transmission of information?
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You can get the same result classically. You don't know fancy entangled photons.
The example is trivial, I have 2 index cards. On one card is written "+1", on the other is "-1." I place at random one card in an envelope and send it to a friend in Japan, I place the other other card in an envelop and send it to you. The instant you open your envelope you'll know exactly what my friend in Japan has.
Can I communicate via this method? No. Why? Because if I perform this procedure many times all I have is a bunch of random results "+1" or "-1". A purely random sequence conveys no information.