So I was told by a buddy about this, but am skeptical. So before porting your number and biting on the ETF, take off your iPhone and put just a regular dummy phone on your account. You can switch the ESN online. Then when you cancel they will just charge you a dummy phone price, instead of the smartphone charge. In addition, it doesn't make your iPhone blacklisted. Any truth to this? Wanting to use the iPhone sales to pay for the ETF, but figured it will have a dirty ESN otherwise.