London, 6th March 2025: Graystone Strategy, a global leader of strategic consultancy to the mobile and telecoms industry, has been named Informa’s preferred training and consulting partner for its prestigious MVNOs World Conference.
James Gray, managing director of Graystone Strategy, has chaired Informa’s MVNO Connect and MVNOs World series for the last three years. In that time the conference has grown significantly, welcoming ambitious leaders from across the globe. Continue reading Graystone Strategy named official training and consulting partner for Informa’s MVNOs World conference
