Power off completely. Hold Volume Up + Volume Down simultaneously while inserting USB cable. Or remove battery (if removable) – for Y12i, it’s not removable, so use key combo: Vol Down + Power for 10 sec, then release Power but keep holding Vol Down.
If you are looking to update or restore your (model PD1930CF) with the 2021 firmware, Vivo Y12i Firmware Overview (2021) vivo y12i firmware 2021
To install the Vivo Y12i firmware 2021, follow these steps: Power off completely
Under the hood, the Vivo Y12i runs on the chipset, paired with 3GB of RAM and 32GB or 64GB of storage . it’s not removable
For OTA updates, use a stable Wi-Fi connection.