Pros: None, it's a scam

Cons: I worked as a cellular technician for 4 years; this is a sticker. If you think a sticker will improve cellular reception, don't you think the manufacturer would have incorporated this into the phone in the first place? I saw this SCAM back in 2003. It's a scam, folks. Don't do it.

Overall Review: If "it works" is defined by: it made the inventor rich, then yes, it might work. If "it works" means acutally functions as a cellular improvement, then, well, you bought a sticker. I would repair cell phones, and remove these from old phones, line them around my computer monitor to improve the "monitor's reception". Really folks? I'm surprised Newegg would sell this junk. It's an insult to anyone smart enough to pick up a cell phone and make a call.