I know rich posted a way how to get it. but i was completely confused and his link didn't work. I have a sprint iphone 4 i'm trying to flash it to page plus i changed the msl to 0's. when i dial ##2539 i enter my spc it asks for my authentication key can anyone tell me how to get it. i have the caculator thing i type in my esn but i don't know what to put in the second box someone please help