How to properly market this product?

There are a lot of suggestions I could make here. Honestly, your lander isn't very exciting. Sometimes that can work to your advantage, but with tech-related landers I've found they have to have some pizazz.

I'd recommend trying to emulate your competition more. Look at some of the landers at the top of google:

Unlock iPhone - How to Unlock iPhone - Factory iPhone Unlock

iPhone Unlock and iPhone Jailbreak

Unlock iPhone 5 /iPhone 4S / iPhone 4 Permanent Unlock!

I just see too much free space not being utilized on your page, and the peach background + light colored font makes it somewhat difficult to read. Don't try to reinvent the wheel. Look at what others are doing, try to emulate them, then tweak and personalize to your tastes as you start getting solid on page time and sales.

What's your analytics giving you for visit duration times and bounce rate? I'll hazard a guess many are less than 60 seconds and your bounce rates are well over 90%. Look at the links I provided and notice how they have lots of snappy images, and tons of well-labelled links that users can click on based on their interests.

You have to be more precise and look at the campaign activities, whenever you run ads start with small amount and keep track of clicks and click through rate, also check your position on search results and quality score of capaign,

after that you have to keep track of your niche business if they run ads for your chosen keywords like some top website landings

Unlock Iphone

Iphone Unlock Codes - Factory Iphone Unlock

look at them and and analyse the structure and behavior of them, try reducing bounce rates and you will sure get the benefits from various ads.