This one may be a hard law to enforce. I would think it would be quite easy to conceal a cell phone under a burka.
The ulema in Pakistan’s North West Frontier Province have declared that use of mobile phones by women is haram, or forbidden in Islam. The Urdu-language newspaper Roznama Khabrain reported that the imam of Jama Masjid Hazrat Umar Farooq made the announcement during his Friday sermon.
But it's ok for the guys to use a cell.
Jama Masjid Hazrat Umar Farooq is situated in the Hashtnagri police district of Peshawar. According to the report, the Imam said the religious scholars of the province have agreed by consensus that women cannot use mobile phones. He also said that men are permitted to receive and make calls but mobile phones cannot be used for non-shari’a purposes.