I tried mixing 802.11g with 802.11n with an "n" base station (router), and had nothing but problems. Perhaps I just am not network savvy enough - but pulling the 'g' AE made everything run a whole lot smoother. No experience with the adapter you link to though. I think your cell interference comes in at 2.4ghz and you can now get 5ghz routers that should be immune to interference by the former.
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