Ookla is proud to announce O2 CZ as the Speedtest Award winner for Fastest 5G Network and Best Mobile Network in Czech Republic! Based on an in-depth analysis of consumer-initiated tests taken with Speedtest during Q3-Q4 2025, O2 CZ achieved a Speed Score of 51.84, with median download speeds of 144.25 Mbps and median upload speeds of 31.30 Mbps. Analysis of consumer-initiated tests taken with Speedtest during the same period further indicates that O2 CZ achieved a Speedtest Connectivity Score o
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