Boone uses the radio found in the Nigerian plane, and gets a response from someone else claiming that they too are the survivors of Flight 815, however since the plane falls and as a result Boone dies, I don’t think he gets a chance to tell anyone what he heard. We find out in season 2 that it was the Tailies who responded and they cut short their transmission because they thought Boone was the Others trying to trick them.
Locke and Boone discover the Nigerian plane that we later find out contains the remains of Ekos brother Yemi, and little do they know that the directly below the plane is the hatch to the pearl station. At this point they don’t even know what the hatch they are attempting to open leads to, but if they had discovered the Pearl, they would have probably seen Desmond on the monitors in there.
Anyone else notice that Locke seems to have had a LOT of different jobs, I pretty sure that each time he has a flashback episode hes working in a different job. So far some of the jobs have been, his position at the box company, an at a toy store and as an house inspector.