Whilst updating my games on xbox the speed is constantly changing from 1Mb/s to around 10-20Mb/s and occasionally up to 70Mb/s. I once saw it at 200Mb/s. I have a 802.11ac router which has to go through a ceiling from downstairs. If the wall wasn't there it would be about probably about 5-7m away. Most of the time it sits at 1.47Mb/s and moves slightly around that area. For a while it goes up to about 10-20Mb/s but then back down. I don't know what to do to try and fix it so it remains at a decent constant speed. Please help, thanks!
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Hardwire the xbox. Perform a speedtest for your internet and see if it matches your provided internet package.