Oppo F15 receiving Android 11-based ColorOS 11.1 stable update 
The Oppo F15 unveiled last year with Android 9 Pie-based ColorOS 6.1 received the Android 11 beta in India in January, and it appears the testing has gone smooth as the company has started rolling out the stable build of Android 11-based ColorOS 11.1.
According to Oppo’s rollout schedule announced earlier this month, the F15 was supposed to get the Android 11 stable update in India starting March 17. But some users have already received the latest version of Android, indicating Oppo has started seeding the update to a limited number of users, and a broader rollout will commence in a few…
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