Performance
Equipped with the Mediatek MT6771V Helio P70 chipset and an octa-core CPU, the Oppo A91 handles everyday tasks with relative ease, from browsing the web to streaming multimedia content. The device is available with 4GB or 8GB of RAM, providing the necessary memory to support multitasking and app-switching without significant lag. The inclusion of UFS 2.1 storage technology enhances data transfer speeds, making loading and saving files quicker compared to older storage types. The phone initially launched with Android 9.0 (Pie) but is upgradable to Android 11, running on Oppo's ColorOS 11 interface, which adds useful features and enhancements to the user experience.