http://story.news.yahoo.com/news?tmpl=story&cid=569&ncid=738&e=8&u=/nm/20040921/tc_nm/life_mexico_cellphones_dc...
Four churches in the northern city of Monterrey, which lies some two hours by car south of the Texas border, are using equipment made by Israeli telecoms equipment firm Netline Communications Technologies to block incoming calls during services.
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"Before we had the system, it was very uncomfortable hearing calls coming in during the celebration of mass. But now it's 95 percent quiet," said Bulmaro Carranza, a caretaker at the city's Baroque-style Sacred Heart church.
The signal-jamming equipment is packed into two wall-mounted boxes the size of small hi-fi speakers, with one beside the altar and the other at the church entrance.
Switched on just before the start of every service, the system causes a "no signal" message to be displayed on worshipers' phones, but causes them no lasting damage.
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Anyone know of this being implemented in their place of worship?