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welcome to TechIMO.
there are certain downloading programs that accellerate your dl speeds, but when you already suffer from a bottleneck due to slow data thoroughput, these programs have limited benefits.
a company that advertises a
400% increase in speeds while using the
same technology as other companies in your area seems suspect. it's possible that in your country there aren't the same type of "false advertising" laws that we in the USA enjoy, which protect consumers from false statements describing services/products.
~Branson