How to Enable USB Debugging & Developer Options on TCL Phones

This guide will help you enable Developer Options and USB Debugging on your TCL phone so you can successfully connect it to your computer for app debugging, file transfers, Screen mirroring, using PC application.

Follow these version-specific instructions to ensure proper connection between your TCL device and computer.

Part 1. Steps to Open USB Debugging and Developer Options on TCL Device
Part 2. Connection Troubleshooting
Part 3. Need Further Assistance?

Part 1. Steps to Open USB Debugging and Developer Options on TCL Device

For TCL Phones Running Android 10, 11, 12, 13, 14, 15, 16+

*(TCL 10 Series, 20 Series, etc.)*

Step 1. Open Settings → Go to System (or System & Updates).

Step 2. Tap About phone → Find Build number.

Step 3. Tap Build number 7 times until you see "You are now a developer!"

(If prompted) Enter your PIN, password, or pattern.

Step 4. Go back → Now open Developer options.

Step 5. Toggle USB Debugging ON → Tap OK to confirm.

Step 6. (Optional but recommended) Enable OEM Unlocking if needed for ADB/fastboot.

Done! Your TCL phone now allows USB Debugging.

For Older TCL Phones (Android 8, 9)

*(TCL LX, Plex, Alcatel-branded models)*

Step 1. Settings → System → About phone.

Step 2. Tap Build number 7 times → "Developer mode enabled" appears.

Step 3. Press Back → Open Developer options.

Step 4. Turn on USB Debugging → Confirm with OK.

Key Differences

(1) Android 10+: May require PIN verification

(2) Android 9 & Below: No extra security checks

Security Recommendations

(1) Only enable USB Debugging when needed (disable it later).

(2) Never allow "Always allow from this computer" on public PCs.

(3) Revoke USB authorizations after use: Developer options → Revoke USB debugging authorizations.

Part 2. Connection Troubleshooting

1. Developer Options missing?

Ensure you tapped Build number 7 times (watch for confirmation message).

2. USB Debugging greyed out?

Try restarting the phone or enabling OEM Unlocking. Learn more >>

3. Computer not detecting phone?

Use a different USB cable, check File Transfer (MTP) mode, or restart both devices.

Part 3. Need Further Assistance?

If you require additional support, please don't hesitate to contact us at support@coolmuster.com with the following details:

(1) What's your Android device's brand, model, and OS version?

(2) Describe your problems in details.

(3) Send us some screenshots to show the problems.

For other questions regarding Coolmuster products—such as installation, usage, or connectivity, check out our Product FAQs page. You'll find solutions tailored to your specific product.

Related Articles:

Failed to Connect Your Android Device to Computer via USB? Here's What to Do

What to Do If USB Debugging Enabled But Detection Still Failed?

What to Do If the Program Does Not Recognize My Android Device?

How to Do if the Driver Installation Failed?