: If the phone asks for a Google account after flashing, you can use the "Reset FRP" button in UMT's "Read & Tools" tab while in EDL mode.
| File Name | Description | | :--- | :--- | | preloader.bin | Initial bootloader for MediaTek. | | lk.bin | Little Kernel (bootloader UI). | | boot.img | Kernel and ramdisk. | | recovery.img | Stock recovery environment. | | system.img | Main Android OS (sparse or raw). | | cust.img | Vendor-specific customizations. | | scatter.txt | The partition layout map (essential for UMT). | | userdata.img | Factory data partition. | | cache.img | Temporary system cache. | Vivo 1801 Flash File Umt