How To
Theres 2 versions of this firmware and i already patched them for you!
If the version 3.0 doesnt work (in my case the screen was out of place) install the 3.1 version.
Simply extract the "new firmware" Folder wherever you want and then put the files of the 3.0 or 3.1 folder in you Letcools micro sd.
Afterwords, in your letcool, go to settings, system information and kep pressing A untill it starts the update.