Idea Cellular and NSN have signed a $500 million GSM network expansion contract, valid for two years. Under the deal, NSN will expand Idea Cellular's GSM/GPRS/EDGE networks across Delhi, Haryana, Uttar Pradesh (East and West), Andhra Pradesh and Kerala. NSN will also supply GSM, circuit and packet core as well as intelligent network equipment to Idea Cellular. Under an inbuilt clause, depending on the fulfilment of certain conditions by Nokia Siemens, Idea could increase the order size to $1 billion.