What will they do during seder?

According to Israel's pirate radio station, Arutz Sheva, members of the Gur sect of chasidim who are learning in seminary or yeshiva are not allowed to own cell phones. This ban, however, does not apply to those in the business world the article claims.

But what about Cellcom, Orange, Pelefone, Amigo and all the other cellphone companies?!?