Former Apple CEO Steve Jobs was still working on the company’s “next project” up until the day he died.

PC Magazine reported that current Apple CEO Tim Cook and Masayoshi Son, the CEO of SoftBank Capital, which distributes the iPhone in Japan, were in a meeting together when Cook got a strange phone call from Jobs and had to abruptly leave the room.

“I said, ‘Where are you going?’ [and Cook] said, ‘My boss is calling me,’” Son said. ”That was the day of the announcement of the iPhone 4S. He said that Steve is calling me because he wants to talk about their next product. And the next day, he died.”

Cook’s reaction led Son to conclude that ”the announcement of [Apple's] newest product made [Jobs] live longer.”

Apple’s newest product is the iPhone 4S, which was announced on  Oct. 4. Jobs died at age 56 from pancreatic cancer on Oct. 5.

READ: Apple stores close to honor Steve Jobs

However, Cook’s vague statement about the company’s “next product” could have referred to any number of possible future Apple items. It has continued to fuel speculation and rumors online that Jobs could have been working on the iPhone 5 (or perhaps the iPad3?) for next year.

One thing is obvious: Despite his waning health, Jobs’ devotion appeared to have marched on until his final day.

In 2007, “Nightline” sat down for a rare interview with Jobs, a notoriously private person, to discuss the launch of the original iPhone. Watch the interview here: