TelecomTV's daily roundup from Mobile World Congress, The Slice, devoted its second-day edition to four topics now dominating operator and vendor discussions: quantum technology, artificial intelligence, Open RAN and 6G.

The digest format means each theme gets a short treatment rather than a full analysis, but the selection itself signals where the industry's attention has shifted at this year's show in Barcelona. Quantum computing and quantum-safe security have moved from research labs toward operator planning cycles, as carriers assess how post-quantum cryptography will affect their network security roadmaps. AI continues to anchor vendor pitches across the show floor, spanning network operations, customer experience and service creation.

Open RAN remains the third pillar of the agenda. The technology has moved past its early promotional phase and into commercial deployment assessments, with operators weighing vendor interoperability, energy efficiency and total cost of ownership against the maturity of traditional single-vendor radio networks.

The fourth theme, 6G, points to the standards timeline that will shape the next cycle of infrastructure investment. Work on the next generation is already under way in standards bodies, and MWC has become the venue where vendors preview candidate technologies and operators press for realistic requirements rather than marketing-led feature lists.

TelecomTV publishes The Slice throughout the congress as a rapid summary of each day's developments, pulling together announcements, panel discussions and show-floor news. Readers following the event can expect subsequent editions to track how these four themes develop across the remaining days of the show, including any vendor contract news, operator deployments and regulatory statements that emerge from Barcelona.