The investment plan came as the company reported a net profit attributable to shareholders of 17.95 billion pounds in the half year to end-September, in contrast to a loss of 1.98 billion pounds during the same period last year.
Colao faced reporters with a cheery confidence, arguing that while trading conditions in Europe remain tough, the economic outlook is encouraging. He noted potential for growth in South Africa, India, Egypt and Turkey.
But he dismissed at the notion that Vodafone was "shopping" with the proceeds of the big U.S. deal.
"I don't like the term," he said.
He also declined to talk about reports that American phone giant AT&T might be interested in buying Vodafone though when asked he did underscore his belief in his company's overall strategy.
"Any further questions will have to be put to them, not us," he said.