请把以下内容翻译成中文并简要总结，要求用一句话表达出主要观点。
以下内容为：
The number of mobile phone users worldwide exceeded 5 billion in 2019 and continues to rise as mobile communication technologies evolve and become more affordable. However, despite the increasing number of users, a significant portion of the world's population, primarily in developing countries, remains without access to mobile phones due to factors such as economic constraints and lack of infrastructure. This gap highlights the challenges in achieving global digital inclusion.
user
全球移动电话用户数量在2019年超过50亿并持续增长，但由于经济限制和基础设施缺乏，发展中国家仍有大量人口无法使用移动电话，突显了实现全球数字包容性的挑战。
assistant