Nokia went through typical product life cycle stages from introduction to decline over the years. It started with early mobile phone models in the 1990s during the introduction phase with low sales. Growth occurred in the 2000s as models like the Nokia 3310 became popular and sales increased. The maturity phase saw a focus on touchscreen and smartphone models but competition from Android and iOS increased. Finally, Nokia entered a decline phase from 2011 as it struggled to compete with other operating systems and eventually sold its mobile phone business to Microsoft in 2013.