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Finding a custom ROM for the Vivo Y1S (PD2014F) can be tricky because Vivo's bootloaders are notoriously difficult to unlock. However, since it uses a MediaTek MT6765 (Helio P35) vivo y1s custom rom
. GSIs are universal versions of Android (like AOSP or LineageOS) designed to work across various hardware, though they often suffer from bugs in features like the camera or Bluetooth. Essential Steps for Modification Here is that piece: Finding a custom ROM
Given the difficulty of finding stable, device-specific ROMs for the Vivo Y1s, many users find better results through less invasive optimization. Simple steps like performing a hard reset device-specific ROMs for the Vivo Y1s