In 6G technology development, the focus is shifting from initially expected sub-terahertz frequencies to FR3 (cmWave band), which maintains realistic coverage from existing macro sites while enabling broader bandwidth access and improved energy efficiency. AI-native integration with sensing technology is becoming central to 6G, with AI evolving from an add-on feature to the foundation of network design—a key industry theme.

Coexistence and spectrum sharing between satellite and terrestrial networks have emerged as strategic challenges in 6G development. The FR3 band already hosts existing uses including satellite communications, Earth observation, and defense radar. Strengthening filters, guard bands, interference mitigation, and dynamic sharing policies between terrestrial (TN) and non-terrestrial networks (NTN) have become more critical than raw communication speed.

The most important 2026 milestone is demonstrating interoperability among multiple stakeholders. Operators, infrastructure vendors, chipmakers, and verification partners must collaborate using common test frameworks to accelerate proofs-of-concept. Security integration from the design phase is essential, requiring quantum-safe cryptography and enhanced physical layer resilience.