The implications of mobile number portability (MNP) were discussed at a Workshop on Implementing Mobile Number Portability, held in August 2007 in Islamabad, Pakistan. The forum, comprising participants from the Asia-Pacific, the Middle East and Africa, provided insight into the technical, regulatory and operational aspects impacted by the porting process, with a focus on the Pakistani MNP experience. The reasons cited in favor of MNP were classified into advantages to subscribers and regulators. The former were benefited by an increase in choice (of packages) and the eliminated costs of having to inform third parties of a number change, while the latter saw MNP as an approach to attract new investment and generate healthy competition. Operators on the other hand, were split in their views; new entrants and operators with smaller market share were of the view that it would create fair play in the industry, but larger operators with significant market power were, unsurprisingly, against the implementation of MNP.