Latency is the delay before data begins traveling between your device and a remote service; speed is the rate at which data transfers. A good 5G connection can have low latency, but an ordinary 5G icon does not guarantee it.
Understand the two measurements
Download speed is usually shown in megabits per second (Mbps). Latency is typically expressed in milliseconds (ms). A lower latency number can make interactive actions feel more immediate, even when download speed is modest.
When latency matters
Live gaming, remote controls, voice calls and video conversations respond to delays. Large file downloads usually benefit more from throughput than tiny reductions in latency.
Why numbers change
Network congestion, routing to distant servers, Wi-Fi conditions and the app itself all contribute to delay. Even an excellent cellular link cannot eliminate every processing step across the internet.
Test the task you actually care about
Compare latency and jitter at different hours, then try a real video call or game. Jitter means variation in delay; inconsistent latency can be disruptive even when the average looks acceptable.
Frequently asked questions
Does 5G always beat LTE for latency? No. Local deployment, signal quality and routing can reverse the result.
Is zero latency possible? No. Signals and systems still require time to transmit and process information.
Further reading: GSMA — spectrum needs across low, mid and high bands.
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