Jews are very particular in keeping the Sabbath holy, and they aren’t supposed to do any work at all on that holy day. Even making a phone call under situations that do not involve life and death is prohibited even in the army, which is why the Shabbatphone was developed to get around this legalistic loophole. The device makes and receives calls in an indirect manner, ensuring the person using the phone was not directly closing any electrical circuits, hence making the phone conversation kosher. What do you think about this? Future developments that involve voice activated phone calls will definitely turn this law upside down as everyone chats away on the Sabbath.