If the official site does not have the version you need (common for rolling back updates), you must look into community archives.
Q: Will manual firmware wipe my apps? A: Yes. The USB "IMG" method performs a full factory reset. Backup your Google account and installed apps first. Download Tcl Firmware For All Models
Q: I have a Roku TCL TV. Does this guide work? A: Partially. Roku TCLs (models starting with 3, 4, 5, 6 series) use Roku OS, not Android. You cannot flash Android firmware on a Roku TV. For Roku, go to Settings > System > System update > Check now. If the official site does not have the
Q: My TV says "Invalid signature" during update. A: You tried to install a beta firmware on a locked bootloader TV. You must use the "M999" Test versions specifically designed for your region. Developers often upload stock firmware here
Q: Where can I find old firmware (downgrade)?
A: The Telegram bot (@tclfirmware_bot) allows you to type V8-T615T01-LF1V100 to grab older builds. You cannot downgrade if the security patch date is older than 6 months (TCL blocks rollbacks).
Developers often upload stock firmware here. Search for your specific hardware ID (e.g., T653T02).
| Category | Model Prefix Examples | |----------|----------------------| | Android TV | C715, C725, C825, P615, P725, P815, X915, C835, C845 | | Roku TV | S4, S5, S6 series (e.g., 43S435, 55S546, 65S555) | | Google TV | QM8 (Q650G, Q750G, Q850G), Q7 | | Smartphone | TCL 10L, 10 Pro, 20S, 20 Pro 5G, 30, 30 XL, 40 NxtPaper | | Router | H150, H168, H298A, AC1200 |