Who called from 2137108112

got a call on my cell from this number-didn't leave a message

I picked up my cell phone and no one answered the phone. I tried calling the number back and it said press 1 if you want to be taken off the mailing list but it didn't say what or who it was.

some recorded message... didn't listen to it.  Called it back and did the same as above, just entered 1 to be removed from calling list.

On my CID it shows as "OTO INC"

Same thing. Left no message - I called back, pressed "1" and hopefully no more calls will occur.