: While basic Android Developer Options (OEM Unlocking) can be toggled, they often don't truly unlock the bootloader on vivo without additional exploit tools. Developer Resources & Tools
Ultimately, while the vivo Y1s is a capable budget phone with a convenient fingerprint scanner , its custom ROM story is mostly written by advanced users willing to navigate strict security barriers to unlock more performance from their hardware.
(If a string of numbers appears, your device is properly connected). Disable Android Verified Boot by flashing the vbmeta image: vivo y1s custom rom
Follow device-specific guides; steps here are general. If unsure, consult the ROM thread for your device codename before proceeding.
Flashing a custom ROM will wipe all your data. Before doing anything, ensure all your personal files (photos, videos, documents) are backed up to a cloud service or a computer. : While basic Android Developer Options (OEM Unlocking)
Remove pre-installed apps that drain your battery and fill up the limited internal storage.
A significant challenge you'll face when trying to find a custom ROM for the Vivo Y1s is the sheer amount of contradictory information. As of late 2021 and beyond, many sources, including the now-defunct GetDroidTips, have stated that it is "impossible to flash a Custom ROM on your Vivo Y1S" due to an inability to unlock the bootloader or gain root access. However, other guides describe the entire process as if it were straightforward and routine. Disable Android Verified Boot by flashing the vbmeta
Connect the phone to your PC. Open a command prompt inside your ADB folder ( Shift + Right Click > ). Verify the connection by typing: fastboot devices Use code with caution.
Download a trusted (such as the MTK Bypass utility by Kamarush or similar open-source tools).
Once the flashing process reaches 100%, clear the cache metadata one last time and restart the device: fastboot erase cache fastboot reboot Use code with caution.