Not sure if this is already known, or if it's useful at all.

Rogers introduced extreme txt messaging, one feature allows incoming and outgoing txt's to be "copied" to another phone #.
this is all done server side, the iphone doesn't forward them.

i was doing a bunch of test restores on a phone that had the "copy" function enabled.
each time the phone would "activate" through iTunes, it would "copy" a outgoing message that would simply say "STATE"

i restored 5-6 times, and it would do the same thing each activation.

this may be useless. but i'm just passing it on.