Unresponsive screen LEMFO LEM 7 v2.5

I need to flash and restore my LEM 7 v2.5, but the screen is unresponsive as in jittering. I can’t select Settings > Reset equipment.

How can I flash the phone and reinstall system from scratch? Which files will I need?

You can flash it with FlashTools. You will find the instructions in the firmware section. When asked to plug the watch in, just plug it in and hold the power button until it powers off, then, everything will start flashing normally.