Here's about all the evidence you need that China Unicom will be carrying the iPhone 4.
Employees at carrier China Unicom are preparing for the September 20th launch of the iPhone 4. The device is officially making its way to China, and employees are being briefed on the device.
Right now, they are learning about all the different parts of the handset, such as the Retina display, the A4 chip, multitasking and a variety of other features included on Apple's popular phone.
This briefing is reported to be held at the Guangzhou branch office of China Unicom, and all of the company's employees are required to attend.
At the very least, these employees will be some of the most knowledgable available for selling the new handset.
[Via WeiPhone (Google Translate)]