Understanding Cells, Sectors, Carriers and Frequencies in Mobile Networks

This article explains the differences between cells, sectors, carriers and carrier frequencies in mobile communication systems, covering base station components, antenna types, coverage strategies, and how various network generations map logical cells to physical sectors.

base stationcarriercellular network

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Understanding Cells, Sectors, Carriers and Frequencies in Mobile Networks

macrozheng

Dec 13, 2019 · Fundamentals

How China’s Number Portability Works: Behind the Scenes of Mobile Number Transfer

This article explains the technical foundations of China's number portability service, covering regulatory background, MDN and IMSI structures, call and SMS routing changes, the centralized portability database, and the impact on developers who previously relied on number‑prefix detection.

Developer ImpactIMSINumber Portability

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How China’s Number Portability Works: Behind the Scenes of Mobile Number Transfer