You're looking for firmware for the TCL 30 SE. Here are some general steps and resources that might help:
If the phone continues to loop after a successful flash, boot into the device's native recovery mode (Hold Power + Volume Up when off) and perform a "Wipe Data / Factory Reset", then reboot. firmware tcl 30 se
The initial boot can take up to 5–10 minutes as the system builds a fresh cache. Set up your phone as new. Troubleshooting Common Errors SP Flash Tool Error: "Status BROM Exception" You're looking for firmware for the TCL 30 SE
Look for a text file named something like MT6762_Android_scatter.txt . Select it and click . Step 4: Configure Flashing Settings firmware tcl 30 se
The Complete Guide to TCL 30 SE Firmware: Updates, Flashing, and Troubleshooting