Reuters reported that the launch of the platform, scheduled for March but which may be delayed due to the outbreak of the coronavirus, appeared to be geared at challenging the reach of Google's Play Store.
The four brands together made up 40% of global shipments in the fourth quarter of 2019, going by IDC figures.
OPPO and vivo are both owned by BBK Electronics, which also owns the OnePlus brand. Apart from Huawei, the other three brands have access to Google's Play Store. Huawei was banned from using Google's proprietary software in May last year.
Initially, the service will cover countries such as India, Indonesia, Russia and Malaysia. Xiaomi has a sizeable market share in India, while vivo and OPPO sell well in southeast Asia.
Huawei's strongest market outside China is in Europe.
After the US blacklised Huawei in 2019, the company developed its own mobile operating system known as Harmony OS and also a Linux distribution based on the CentOS distribution. It is yet to launch any mobiles running Harmony OS.
One of Huawei's 2019 released, the Huawei Mate 30 Pro, had no Google proprietary apps, and used the open source version of Android. It has not sold well, according to some reports.