Nothing will make your speeds faster than what your provider/bandwidth allow. That is, of you get 10mbps at your modem, nothing will make that faster.
Now, the USB sticks are basically external wifi antennas. They can be more powerful than built-in antennas in older computers, but are generally meant to be used with devices that don’t have built-in wifi capabilities (like desktop and tower units).
When they say high speed, they simply mean that the USB device can transmit and receive data at a rate comparable to a Ethernet (or Hardline) connection.
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