There are two primary problems with cell or mobile phones. Most cell phones operate by sending signals to a nearby antenna. Cell phones are, bottom line, radios with a connection to a telephone company. If the wires are strung between poles, the wind knocks them down or falling debris breaks the connection. Fires also take their toll on above-ground facilities.
Underground cable is endangered by moisture as the ground is saturated by a deluge.
A few years ago, this was not a serious problem. Cell phones were used only by the rich and famous. Wonderful thing, cellular communication. What this means to the BC planner is that even if the protected facilities are not in an area with cellular saturation, the local systems could still be overloaded by travelers and other BC planners on TDY 1 to the area. That will solve the problem.