No difference vs. stock antenna. Could be my router. Will do more testing.

To be honest, my before and after has not changed a single decibel. I've used a wi-fi sniffer. I don't know if it's my router (Verizon FIOS) or my walls. So I want to be careful telling people this device doesn't work, but it does nothing for me. If I determine what the issue is, I will gladly update this review, but after two weeks I just have an empty wallet and a larger antenna - but no better signal.

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