The satellite phone info comes from a 2003 Superbowl commercial parody:
A FedEx commercial during the 2003 Super Bowl parodied the final scene of the film, in which Chuck returns a package to its sender. In this version, the woman answers the door, and when Chuck asks what was in the box, the woman replies: "Just a satellite phone, GPS locator, fishing rod, water purifier, and some seeds. Just silly stuff."
In fact the third draft of Cast Away (that has a few differences from the finished movie) reveals that the package contained two bottles of salsa verde:
The package, however, is exactly the same as in the finished movie:
the same angel wings, the same woman at the beginning, and the same
insane resolution to deliver it no matter what. And then, on his
1,000th day on the island, Chuck goes "eh, what the hell" and opens
the box. So what's inside?
Two bottles of salsa verde. Also, a note from a woman named Bettina
begging her husband to come back, apparently hoping some spicy
condiments will do the trick. Chuck looks at the bottles, reads the
note, then puts everything back into the package and continues
carrying it with him. It makes absolutely no difference. This could've
perfectly been a deleted scene in the movie itself.