Q4. According to Nokia:

According to Nokia:
The Nokia One Mobile Connectivity Service provides easy and secure access to email, calendar, directory and more from a mobile phone, PDA, PC or fixed-line phone - take your corporate applications mobile.

Why is a company like Nokia - http://www.nokia.com - described as having end-to-end expertise?

According to Takeshi Natsuno, media director of Gateway Business Department, NTT Mobile Communications Network, Inc (NTT DoCoMo) of Japan:
The mobile phone will be an electronic wallet.

Answer:

Nokia is a world leader in mobile communications, driving the growth and sustainability of the broader mobility industry. Nokia connects people to each other and the information that matters to them with easy-to-use and innovative products like mobile phones, devices and solutions for imaging, games, media and businesses. Nokia provides equipment, solutions and services for network operators and corporations. (Nokia, 2007)

Nokia is described as having end-to-end expertise because Nokia recently works with Siemens to create Nokia Siemens Networks which brings a full end-to-end expertise to help customers maximize investments and provide seamless experiences for end users.

Siemens (Berlin and Munich) is a global powerhouse in electrical engineering and electronics. The company has around 475,000 employees (incl. discontinued operations) working to develop and manufacture products, design and install complex systems and projects, and tailor a wide range of services for individual requirements. Siemens provides innovative technologies and comprehensive know-how to benefit customers in over 190 countries. (Nokia, 2007)

Reference:

1. Nokia (2007). "Nokia Siemens Networks: Preparing to Connect the World". Press Release of Nokia.com, Retrieved from URL - http://www.nokia.com/A4136001?newsid=1104266