How To Use Secret Codes On Tcl 30 Xl 4g • Direct

📌 Before using any reset code, go to Settings > System > Backup and back up your photos, contacts, and files.

Ensure you are on the Dial Pad (where you type phone numbers). Type the code exactly as written. How to Use Secret Codes on TCL 30 XL 4G

*#*#0*#*#*

| Code | Access | |------|--------| | *#*#3646633#*#* | MediaTek Engineer Mode – adjust audio gains, RF bands, antenna, and GPS. | | *#*#83781#*#* | Alternate Engineer Mode entry for some TCL models. | 📌 Before using any reset code, go to

While most of these codes are read-only, some advanced menus (like the factory reset code # #7780# # ) will wipe your device immediately. Always ensure your photos and contacts are backed up to the cloud before experimenting with deeper system codes. 📌 Before using any reset code