MOST LAWS ON THE SUBJECT READ SOMETHING LIKE THIS: It is a crime to use a telecommunications device, as defined, intending to avoid the payment of any lawful charge for service to the device, or to possess or manufacture a telecommunications device with intent to sell or offer to sell the device to another, intending to avoid the payment of any lawful charge for service to the device. WHERE DOES IT SAY YOU CAN'T CHANGE AN ESN??? It says you cant IF you are going to commit a fraud--then it could be illegal, but changing the ESN on your OWN property to use on your OWN line that you pay for seems OK. What am I missing? Sprint's official line is that "Android phones wont work on legacy plans". So there's no extra charge for android. someone might like to have an android phone on a legacy or SERO plan and would need to change the ESN to activate it, but theres no "intent to avoid a lawful charge for service" is there?? So where is the illegality??