a nokia 6225 model is a cdma only model. it can't be converted into gsm in anyway! the slot thats there in the phone is not for sim card but for R-UIM card. none of the cdma operators in india use this card for connection. so in ur case this can only be used only for backup of phone data. so all u can do wid the phone is change to some other cdma operator. there is no way u can convert it into gsm!