Paying for a 600 Mbps Connection, but speed much less

I'm having the same problem. Tech coming tomorrow. Getting around 220.

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@Klangsto wrote:

I am paying for a 600 Mbps connection but the speed test only shows around 220 Mbps download.  Why?

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Is this with a WiFi connection ? If so, for a test, does a computer / device hardwired directly to the router / gateway device with an ethernet cable have the same problem ?