To maximize battery life, the China firmware employs an aggressive "freezer" mechanism for background apps. This is highly effective for Chinese apps (WeChat, Alipay, Taobao) but can delay notifications from international apps (WhatsApp, Telegram, Facebook Messenger) unless manually configured.
The safest approach for international users wanting Google services is to either:
Instead of flashing OPPO China firmware onto a global phone, simply buy the of the phone (e.g., OnePlus Ace 2 Pro instead of OnePlus 11R). It ships with China firmware but at least the hardware matches the software region. Then, install Google Play via the “Google Installer” method and live with limited notifications.
Devices with China firmware typically get ColorOS updates sooner than global versions. They often include experimental features not found elsewhere.
