Why can foreigners use China's communication platform?

Reasons why foreigners can use China communication platform:

1. From the perspective of network operators, the advantage of China communication platform is that it can deploy equipment from different manufacturers, which provides easier interoperability as an open standard.

2. From the user's point of view, the main advantage of China communication platform is to provide higher digital voice quality and low-cost new options (such as SMS) to replace calls.

This standard allows network operators to provide roaming services, and users can use mobile phones all over the world.