speedtest.net will not detected simple download or upload problems and so it is a pretty fake and inaccurate tool and it's been that way for a loooong time now. It will be accurate only if you have no problems with your ISP.
Fabiano M.'s review of Speedtest earned 3 Very Helpful votes
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I use 4 different tests after trying 16. I want the speed before it enters the router and when it...
Its completely not worth test at this site since its gonna show what their customer (Telco) want...