While I appluade your enthusiasm with the whole jammer concept. Be aware that the RF radiation required to jam the cell phone signals listed on Gary's link would be very large. Meaning that if you were ever concerned that you might be microwaving yourself with your cell phone near your brain, this thing should REALLY concern you. The CDMA frequencies approach those used by your microwave oven. I wouldn't want something putting out a lot of energy in that those bands to be near me.....
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise, Magic 1/14, Freedom x 2 6/14
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013