A Kosher phone would be an adapted feature phone to the “special” needs of a certain community of the Ultra Orthodox Jews. The community in target asked for a phone that is dumber than the dumb phone, a phone that suffers from complete retardation. The general idea is that they don’t want to be open to the outside world in any way, but they still want a means to communicate between themselves without breaking the strict boundaries they made. For the task a Nokia feature phone was chosen for its’ cost-effective reasons. But to introduce firmware modifications there was a need to overcome many of the Nokia secret protections and integrity checks.