NEW : Jeffs loses his phone privileges for now . Officials are investigating whether Jeffs preached from prison on last week . The 10,000-member church is a breakaway Mormon sect that openly practices polygamy in the twin border towns of Hildale , Utah , and Colorado City , Arizona , as well as on its Yearning For Zion ranch near Eldorado , Texas . Hildale inmates are allowed to have two people on their call list . Warren Jeffs is currently serving a life-plus-20-year term in Texas for sexual assault .
NEW : Jeffs loses his phone privileges for now . Officials are investigating whether Jeffs preached from prison on last week . Hildale inmates are allowed to have two people on their call list . Warren Jeffs is currently serving a life-plus-20-year term in Texas for sexual assault .