Nope
You'd surely have to register this as well if there's a law that says you've got to register "normal" phones. Also, avoiding detection is pretty simple- PAYG mobiles can be gotten without much ID checking and you can probably get SIMs from Tesco these days...

Or go to another country that has lower ID requirements. It's not like roaming rates are a huge problem when you'd sending the string "KABLOOEY!"

Alternatively they could use one of about a billion other types of detonator- many of which would be perfectly suited to scenarios where the phone would suck.

Also, can you imagine having to report back to Bin Laden "Damn Vodafone! The bomb didn't go off because we didn't have 3G coverage!"
( uberdeity Wondered why Owen Lars knew of the term "hell" on, Sat 1 Aug 2009, 2:08, Reply)