The guy was not sentenced yet, likely won't be, but given how incompetent everyone involved one can not be sure.
Telekom does not want to press charges as far as I know, so despite their gross technical incompetence, at least their they have that going for them.
Hungary recently had a bunch of ethical hackers getting into trouble, but fortunately the people are so outraged at the powers that be trying to jail them that they don't get harmed.