It's called 'caller id spoofing'. The people calling you can make any phone number show up on your caller id. They're making a number show up that charges you money if you call it and press a certain key.
At the same time they've disguised the messages on their pay by phone system as surveys. Those messages normally tell you what you're buying and how much it costs.
Check your bill for unwanted charges if you called this number back.
I NEVER answer these unknown numbers, do not want my cell phone confirmed as a working number and thus increase future calls, if it is a real valid call then they can leave a VM and I'll be glad to get back with them if I choose.
this is from a jail - that's why when you do answer it says 'to accept this free call''.. it doesn't identify as one, but i know for a sad fact from a relative that it is.. the number is LA.. but I thought he was in NM