Wi-Fi slow on Laptop. Fast with laptop on Ethernet. Fast with iphone on Wi-Fi?

Running an Ookla speedtest (speedtest.net and their iphone app) gets me less than 50ms ping and roughly 6mbps when on my iphone on Wi-Fi or on my laptop on ethernet. Same test in same place gets between 400 and 1200ms ping and less than 1mbps when on my laptop on Wi-Fi. Driver for the laptop's Intel Wi-Fi link 1000 bgn is up to date. Please help.

Added (1). Have tried on all 11 of the wireless channels my router will do. This is a more recent problem that I'm sure wasn't an issue before I moved (and got a different home Wi-Fi network) and I'm is even more recent than that. So for sure its not just that my iphone has a better Wi-Fi radio.

Added (2). router only does 802.11b, 802.11g, or 802.11b/g

none work better than the others

Lots of things can be going on here. It could be as simple as your iphone has a better wi-fi radio (IE: better siganl power, better sensitivity). Try changing channels on your router to see if there's a better channel. Try changing the mode (b/g/n). Take the medem out of mixed mode and try g-only or n-only (if your laptop supports it). Some time there are certian router/device combinations that just don't work well.

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