Immediately after the screen turns black, execute:

No physical combination grants Fastboot. The device lacks a bootloader interrupt via GPIO pins in the pre-boot environment. 4. The ADB-to-Fastboot Bridge Procedure This procedure forces the device to reboot from the Android kernel directly into the bootloader interface.

adb reboot bootloader The device screen will go black for 3-5 seconds. Do not interrupt.

Abstract: The NOKIA C1 2nd Edition is an entry-level Android device (Go Edition) that presents unique challenges for software developers and technicians due to its lack of a dedicated recovery partition and common key combinations. This paper details the only reliable methodology to access Fastboot mode on this specific hardware revision (TA-1311) using the Android Debug Bridge (ADB) interface. It analyzes the hardware button limitations, outlines the prerequisite driver configurations, and provides a step-by-step procedure for execution and troubleshooting. 1. Introduction Fastboot is a diagnostic and engineering protocol used to re-flash partitions on Android devices. Unlike high-end smartphones, the NOKIA C1 2nd Edition (running Android 11 Go) does not feature a hardware-based key combination to enter Fastboot directly (e.g., Volume Down + Power). Attempting standard combinations (Power + Volume Up/Down) typically forces a hard reboot or enters "Download Mode" (used for Nokia's proprietary OST LA flasher), not Fastboot.

| Key Combination | System Response | Boot Mode Achieved | | :--- | :--- | :--- | | Power only (10s) | Hard reboot | Normal Boot | | Volume Up + Power | Reboot, no screen prompt | Normal Boot | | Volume Down + Power | Stalls at NOKIA logo | (requires signed Nokia images) | | Both Volume + Power | Bootloop | None |

fastboot devices Expected output: TA1311XXXXXX fastboot

Execute the standard Fastboot reboot command:

adb devices Expected output: TA1311XXXXXX device

Connect the device to the host via USB. Verify connection: