Notice how he holds the phone before he applies the sticker. After, he's holding it with fingertips. In the vid for the iPhone four, he's holding it where the antenna issue is at first, causing the signal loss, then after the sticker, the phone is on the table.
These things have been around for years. I don't think they've ever worked..
I-TENA device, fake? scam? legit? real? - MacTalk Forums
The website is still poorly designed and for someone using another companies products, why are the his howto's on their site?