Sorry guys, but I have to disagree with this "cash the check and refuse to switch" scam. The check reads that cashing it authorizes your local phone company to switch you to ATT. If you put a "block" on and then cash the check but refuse to allow your phone to be switched, I believe you are committing fraud. It is only because of the limited amount of money involved that ATT is not coming after you. Not ethical or lawful in my opinion. I do not recommend that anyone else engage in this highly questionable practice.
Djlawman