Replicate User Cookie/Session On Mobile Device

Here's the synopsis of our problem. We sell several mobile applications and sell through our own website/e-commerce platform. Most people originally hit our website from their PC and order through their mobile phone when their trials expire. Because of this, it looks like we have two users because they used two different devices. This makes it very hard for us to tracking a lot of key metrics on things like Google Analytics and Visual Website Optimizer.

Because the user has to download our product by visiting a 开发者_如何学编程URL on their phone, we think we may be able to create a unique URL for every visitor and replicate that session/cookie data. Would this solution work with Google Analytics? Are there any other techniques that could solve this issue?