Enter Diag Mode Spd [2021] Jun 2026

Wire the phone to your computer, open a command prompt terminal ( cmd ), and execute: adb devices Use code with caution.

The PC should detect the device, and the software will send a command to switch it into Diagnostic Mode Device Manager

Understanding Spreadtrum/Unisoc Diagnostic Mode: A Complete Technical Guide enter diag mode spd

Device Manager └── 📂 Ports (COM & LPT) └── 📟 SPRD U2S Diag (COM5) <-- Device is ready for service operations Troubleshooting "Set SPRD U2S Diag COM Fail" Errors

Comprehensive Guide: How to Enter Diag Mode on SPD (Unisoc / Spreadtrum) Devices Wire the phone to your computer, open a

Press and hold the button (on some models, it’s Volume Up, or both).

Keep holding the keys and connected to your PC. : Open your preferred service tool (such as

: Open your preferred service tool (such as NCK Box, CM2, or a dedicated SPD Diag tool) on your PC.

After the repairs are done, exiting Diag Mode is usually as simple as a long press on the power button to force a reboot or sending an "MTP" command via ADB to switch the device back to its standard file-transfer state.

Before attempting to enter Diag Mode, prepare your workspace. Missing any of these steps will prevent your PC from recognizing the device.