5G (2019+) → mmWave/sub-6GHz/standalone, speeds up to 20 Gbps, latency <1ms, massive MIMO for 1M devices/km².
Nokia: 40% market (2007) → Symbian failure, sold to Microsoft 2013.
BlackBerry: 20% (2009) → iOS/Android crush, pivoted to software 2016.
Windows Phone: 2010 launch → 2% market, discontinued 2017.
Android/iOS: 99% dominance (Android 71%, iOS 28% in 2025).
Mobile evolved from luxury voice tools to essential digital lifelines, driving economic growth (5% of global GDP in 2025), social change, and innovation.
Future: 6G (2030s) – AI-native, terahertz, holographic, satellite-hybrid networks.