This year's Mobile World Congress in Barcelona saw more than 100,000 attendees from 204 different countries and was covered by more than 3000 members of the international media.
More than 2200 companies participated in the exhibition, which spanned nine halls and a dozen outdoor space at at Fira Gran Via and Fira Montjuïc.
Everything from virtual reality, new handsets and ingenious app ideas, to 3D printing, privacy protection and backend solutions were on display.
What exactly goes on at these huge events? Browse through our gallery below and take a look.