Here's the announcement with translation:
As during these days the "Vaad Hatechnelogia" (Organization of Technology) is finishing to eradicate the smartphones owned by the mothers of students of our holy schools-
It is important that if someone knows of some such woman, they should call as soon as possible-
And in doing so speed up the opportunity to put an end to it.
PS: Be aware that there is no acceptable excuse for a woman [to have a smartphone] (i.e. for work).