The phenomenon of quantum entanglement can be puzzling because it seems to involve a type of communication that happens faster than the speed of light, which is normally considered the maximum speed at which information can travel. However, it's important to note that quantum entanglement doesn't actually allow for faster-than-light communication or enable the creation of an interstellar telephone.
When two particles are entangled, they become linked in a way that their properties become correlated. This means that if you measure one particle, it will instantly affect the other particle, no matter how far apart they are. However, this doesn't mean that any meaningful information or message can be conveyed through this entanglement.
The reason for this limitation is because the entanglement itself cannot be used to send messages or communicate in a way that violates the speed of light. Even though the change in one particle's state appears instantaneous, it doesn't carry any useful information that can be used to transmit messages faster than light.
The information obtained from measuring an entangled particle is random and unpredictable until the measurement is made. So, in order to use quantum entanglement for communication, you would still need to send classical information using traditional means, such as through light or radio waves, to convey the measurement results. This classical information transfer is still bound by the speed of light limit.
While quantum entanglement has many fascinating applications in quantum information science, such as quantum cryptography and quantum computing, using it for faster-than-light communication remains impossible based on our current understanding of physics.