If you are uncomfortable with the technical steps, visit an authorized Vivo service center and request a “reflash to PD1909BF_EX_A_1.72.9 – 2021 build.”
You can update your device using the following official methods provided by Vivo Support : 1. Over-the-Air (OTA) Update
The Vivo Y12i was released in 2019, and it ran on Android 9.0 (Pie) out of the box. In 2021, Vivo rolled out several firmware updates for the device, which brought various improvements, bug fixes, and security patches.
