How I Enabled ADB on Locked Phones Using Secret Dialer Codes (2025)

Bypass locks and enable debugging without recovery mode

ADB Debugging Hidden Codes FRP Bypass

Pro Tip: These hidden dialer codes can open internal settings or engineer menus — even before unlocking the screen. Works when:

• The screen is locked (but still functional)
• USB debugging was never enabled
• Recovery/fastboot isn't accessible

📱 Working ADB Enable Codes for Locked Phones (2025)

HUAWEI

*#*#2846579#*#*

Brings up Project Menu → USB Settings → enable ADB directly. Tested on Huawei Y9 with PIN lock.

XIAOMI

*#*#6484#*#*

Access Hardware Test menu → USB diagnostics. Works on some locked Redmi devices.

VIVO

*#*#225#*#*

Works on some FRP-locked Vivo models. ADB toggle may be buried in submenus.

OPPO

*#899#

Direct access to Engineer Mode on locked OPPO A37 devices.

INFINIX/TECNO

*#*#49#*#* or *#85#

Works on many FRP-locked Transsion phones to access engineering functions.

ALCATEL

*#2886#

LENOVO

*#*#4636#*#*

SONY

*#*#737378423#*#*

MOTOROLA

*#*#2486#*#*

HONOR

*#*#2345#*#*

ONEPLUS

*#*#2346579#*#*

🔧 Real-World Success Case

Device: Xiaomi Redmi 9A (Locked, no USB debugging, FRP locked)

Solution: Dialed *#*#6484#*#* → Hardware Test → USB Configuration → Enabled ADB

Result: Gained ADB shell access without flashing, backed up data, and removed lock screen

⚠️ Important Notes

• These codes only work if the dialer is accessible (not blocked by lock screen)
• Some carriers/models disable these hidden menus
• Never change unknown settings - may cause permanent damage
• For completely locked devices, professional tools may be required
• Android security updates may patch these methods over time

Last tested: May 2025 | Results may vary by model and region

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