If your phone is not booting correctly or you need to re-flash the software, TCL provides a desktop tool. : Visit the TCL Support site to download the Mobile Upgrade tool for your PC.
Flashing firmware manually carries risks and may void your warranty. Always ensure the firmware version matches your specific model number (e.g., T601DL). Quick Troubleshooting Security Patches: Firmware TCL 30 XL 4G