I used my Sprint upgrade and picked up a brand new 4S to sell. I know with the At&t model I need to pop out the SIM so that the new owner doesn't activate the phone on your account. But do I need to do anything with a Sprint phone? Sprint will only activate the IMEI number and that won't be linked to my account unless I activate it, right? Any advice would be helpful, thanks. And please don't judge. I lost my job and am doing what I can to make ends meet.