If your phone is stuck in a slumber and won't turn on, you need the TCL Mobile Upgrade tool for your PC. Preparation: Back up any data you can, as this often resets the device. Installation: Download the tool from the official TCL Support site The Ritual:
your device to finish the installation once the download is complete. Advanced Firmware Management Firmware TCL 30 XL 4G
Ensure you are connected to Wi-Fi and have at least 50% battery to prevent interruptions. 2. Official Desktop Tool (Mobile Upgrade) If your phone is stuck in a slumber