What 5G actually is
5G (fifth generation) is the latest standard for cellular networks. It offers three main improvements over 4G: higher speeds (up to 10 Gbps theoretical maximum, though real-world speeds are more modest), lower latency (as low as 1 millisecond round-trip time, vs 30-50ms for 4G) and greater capacity (many more simultaneous connections per cell).
The spectrum question
5G uses multiple spectrum bands with different characteristics. Sub-6 GHz bands offer reasonable speed and good coverage — similar in range to 4G. Millimetre wave (mmWave) spectrum above 24 GHz offers extraordinarily high bandwidth but very short range and poor penetration through walls, requiring dense networks of small cells.
What 5G enables
The low latency of 5G is what makes it interesting beyond faster smartphones. It is the connectivity foundation for autonomous vehicles (which need near-real-time communication), industrial IoT applications where real-time machine monitoring matters, augmented and virtual reality applications, and smart city infrastructure.
The geopolitical dimension
The rollout of 5G has become entangled with geopolitics. Concerns — particularly from the US and some European countries — about Chinese telecommunications equipment manufacturers and potential security risks led to restrictions or bans on certain vendors in critical network infrastructure, reshaping the 5G equipment market.