The Register (theregister.co.uk) had an article about a GSM-jammer. It's of questionable legality in most countries, but does work well.
Unfortunately (for some), some providers don't use GSM (Sprint uses CDMA) and wouldn't be affected. For this reason, I thought about getting one. *eg*
Kal.
'04 G35 Coupe 6MT, Black/Black, Premium Package, Aero Package w/Spoiler, Infinity Basslink, Clear Bra
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