I try to install the custom ROM linked in the OP, followed the steps, ran MTKMeta 'Reboot Fastboot Mode', plugged in the turned off phone, but it seems that the device is not found.
any help with that?
PS, the phone does turn on for a few seconds with the TCL logo, but then turns off. (the battery level is at around 90% charged).
Thank you in advance for your help and guidance..