| Feature | Stock Funtouch OS | Custom ROM (Lineage/Pixel) | | :--- | :--- | :--- | | | Heavy, iOS-like, Bloatware | Clean, Stock Android, Lightweight | | Speed | Laggy, stutters on
LineageOS is the gold standard for performance and stability. It strips away all corporate bloat to deliver a pure, high-performance Android environment that runs smoothly on 2GB or 3GB RAM variants. 2. Pixel Experience (GSI)
The primary reason for this is the manufacturer itself. Vivo is known for locking down its devices tightly. The , the software that loads the operating system, is notoriously difficult and often impossible to unlock on many Vivo models, including the Y1s. As one source states, due to these security measurements, you are currently unable to install any custom or modified firmware on the Vivo Y1s because you cannot unlock the bootloader. Without an unlocked bootloader, you cannot flash any custom software, making the installation of a custom ROM completely impossible.
Disclaimer: Proceed with caution. You are responsible for your device. Step 1: Unlocking the Bootloader
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The scene is not as robust as Xiaomi’s, but it is alive thanks to Project Treble. By installing a GSI like LineageOS or Pixel Experience, you can potentially double the performance of this budget phone and enjoy years of updated software. However, the difficulty of unlocking the MediaTek bootloader and the risk of bricking mean this journey is only for the brave.
Once you have chosen your desired ROM file, copy it to an external MicroSD card or utilize a USB OTG drive. Boot your Vivo Y1s into . Select Wipe > Advanced Wipe .
The was released as an entry-level budget smartphone. While its hardware design is decent for the price, the software experience—typically Funtouch OS based on older Android versions—often leaves power users wanting more. Bloatware, sluggish animations, and the lack of modern Android security updates are common complaints.
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Modify fonts, status bars, themes, and system gestures freely.
Because GSIs are generic, they occasionally break VoLTE or network bands on budget MediaTek chips. Look into the "Phh Treble Settings" menu built into the ROM options to toggle specialized MTK features and IMS settings.
Check the partition structure (usually or A-only system layouts).
Deep customization options (themes, fonts, status bar settings). | Feature | Stock Funtouch OS | Custom
Turn off your phone and boot it into by holding Volume Up + Power simultaneously.
Connect to PC. Open Command Prompt.
Because the vivo Y1s launched with , it supports Project Treble . This means that instead of a device-specific custom ROM, you can theoretically install a Generic System Image (GSI) .
The Vivo Y1s, a budget-friendly device released in late 2020 Pixel Experience (GSI) The primary reason for this