You can use entanglement for communication, as long as you also use some classical communication channel in addition to it. If you just want to transfer bits, entanglement does not provide much more than classical communication channels (maybe a bit better signal to noise ratio when used together).

Quantum teleportation requires both entanglement and classical communication channels to be present.

And all of this has nothing to do with FTL communication. No matter what piece of known physics you use, FTL communication is simply not possible. It is not just "not known how to do it", rather it contradicts and causes unresolvable paradoxes in an enormous body of extremely well verified laws of nature.