I need a professional content writer who can produce content for Telcommunication

Num. of articles: 250
Words per article: 600
Blog/website url: www.myyello.com
Information for the blog/website: We offer cheap international calling rates. We also provide free dialer app for the smartphone for cheap as well as free international calling, SMS, video call, Conference call, data sharing, etc.
Topic: What topics, How-To, # Topics, Co-relation to day-to-day problems, etc.
Tone: Instructional/Educational
Outline & Structure: The articles must be customer centric, address the pain-points of the target audience and help readers to convert to customers.
Extensive research needed: yes
Extra notes: The targeted audience can be overseas residents, business professional, travelers, international students, business centers, hotels, resorts, etc.