Hi , I'm a completely new user to android smart phones, having used Nokia phones that could just make calls and texts and take a few photos from time to time. Today bought a ZTE racer. I have charged the battery but when I tried to put my prepaid sim card in, I find it is too large and won't fit. All the instructions are in Greek as I live in Greece but don't speak the language too well yet. Do I need a special card?