The Fontal.A description now contains disinfection instructions both for disinfection by Anti-Virus and manually using third party file manager.
The disinfection was a lot easier than we originally thought it to be. Due to the fact that the trojan disables only the application manager. But the warning about not rebooting the phone still holds, as after trying to boot the phone it won't start, and neither of the instructions on the description will help after that.
So it seems that, as always, the most important instruction is "Don't panic"