I received this little item and wondered looking at it how could this help; but once installed which was easy peasy it worked just as advertised. Boosted my signal from barely one bar to three and four. And the signal has stayed that way for the 24hrs it's been installed. Bravo and to receive four in the pack was great. I would higly recommend this product to anybody that gets less than stellar reception from there cell phone.The tracking of the parcel was strange from my experience but the company/vendor answered up right away to my inquiry and the parcel arrived earlier as usual as per Amazon tradition.So overall Bravo; two thumbs up.