It makes sense to me
Yeah, yeah, I hear you naysayers.
However, in my very specific situation it makes sense. I live somewhere where there is NEVER going to be an official iPhone carrier: Afghanistan. BUT, I'll be home in the US for Christmas, and then only have three months left on my contract here. I'll then be moving back to the US for a while.
I've been debating buying one at Christmas, using for the month I'm home, coming back here, jailbreaking it and using it with a local SIM. That however, would cost me $180 just to get it three months early (because of the AT&T monthly bill).
If I can turn off the edge and only pay $40 a month while I'm not using AT&T, then that means I'm only burning $120.
When I get back to the US, I'll put the AT&T SIM back in and turn EDGE back on. And voila - money saved and I get to show off the iPhone here!😀