Nokia is a Finnish telecommunications company founded in 1865. It is headquartered in Espoo, Finland and is listed on the Helsinki and New York stock exchanges. Nokia launched its first fully portable phone, the Mobira Cityman 900, in 1987 and has since become a major contributor to developing mobile phone standards like GSM, 3G, and LTE. As the largest worldwide vendor of mobile phones, Nokia employs various marketing strategies including developing affordable phones for different income levels and promoting its products through multiple advertising channels. Some of Nokia's top selling models include the Nokia 8 Sirocco and Nokia 7 Plus.