Bloomberg writes this morning on Apple’s senior antenna expert, Ruben Cabellero, who personally warned Steve Jobs (a year ago) about the potential antennae issues with the iPhone 4.

Last year, Ruben Caballero, a senior engineer and antenna expert, informed Apple’s management the device’s design may cause reception problems, said the person, who is not authorized to speak on Apple’s behalf and asked not to be identified. A carrier partner also raised concerns about the antenna before the device’s June 24 release, according to another person familiar with the situation.

Nothing else is revealed about the Caballero other than he was made unavailable for comment. Apple’s press conference is tomorrow, so it looks like Bloomberg will just have to wait.

[via Bloomberg]