I need three writers write about mobile phone tutorials

We're a software company who developing mobile phone data management software.
We need some writers to write about some tutorials about the mobile phone. Here are some details:

Requirements:
1. 1500 words($20) per article.
2. You must be an English native speaker.
3. You must be both an iPhone and an Android phone user.
4. You have experience in SEO writing and have a basic knowledge of keywords.

If you're interested in this, I will send you details about the topic.