All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
It is permissible for a woman to use a mobile phone outside her house if this does not lead to a prohibition, like revealing a secret or talking in a soft and attractive manner and the like.