He installed a custom recovery (TWRP) and flashed a custom ROM—optimized to run lighter and faster than the old stock firmware.
He was back.
This is common on MediaTek devices after unlocking the bootloader. Re-flash the stock image or simply ignore it if the phone boots. To remove: Flash an empty vbmeta using fastboot: fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img firmware oppo f1s a1601
For three years, the F1s served faithfully. He captured Mateo’s graduation, his first job interview, and countless nights out with friends. He was running on Android 5.1 (Lollipop), eventually upgrading to Android 6.0 (Marshmallow). His ColorOS interface was vibrant and simple. Life was good. He installed a custom recovery (TWRP) and flashed
For technicians or advanced users, manually flashing the A1601 typically follows these steps: Driver Preparation : Installing compatible VCOM/MTK USB Drivers Re-flash the stock image or simply ignore it