The Walkman phone, launched in 2005 by Sony Ericsson, combined Sony's renowned consumer electronics with Ericsson's wireless technology and accounted for 25% of the company's sales. The mobile music strategy expanded their portfolio with stylish models featuring high-quality digital music players and easy-to-use software, resulting in a significant increase in sales and profits. However, the brand faced challenges from competitors like Apple, necessitating ongoing product innovation and market adaptation.