No brainer. If you do not honor the commitment made via a legally binding contract, you can be assured that 1. The phone will stop working and 2. You will never again have an iPhone connected through your current iTunes account (so, start all over on your purchases), or cell service with the social security number (until your debt has been satisfied; they aren't crazy, they still want your money) and 3. It will be a derogatory entry on your credit report. Scammers, dream on; and buyers, beware. Since Apple is going to get a ton of year old phones, you can also be sure they will corner the market on used phones. Even if the aluminum is 'highly recyclable', I can't imagine that public outcry won't prevent them from mass destruction of the turned-in phones, so they have to go somewhere....