hi there i hve bought lumia 540 14 days ago since then i have noticed that my wifi is slow at download or stream videos compared to my laptop and other android device i hve at home.. but the strange thing is that when i factory reset my phone it works very well for one or two days then again it becomes slow, i have done this experiment two times and same thing happening now my lumia wifi is again slow in browser as well as in store.. so wht should i do??
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