vodafone sim not valid in voda 4s
i have got a used 4s from a friend which she was using on vodafone. did the icloud log out and reset. put my voda sim in. sim not valid. tried restoring it still no. put her sim back in, works fine. im baffled. been to vodafone. got a new sim. still doesnt work. says sim not supported under the activation policy currently assigned by the activation server.
iPhone 4S