If please somebody can answer to my questions: I travel a lot and I have different sim cards with different companies for each country (UK, Italy, France, Spain...) I want to buy an I-phone in Germany and I accept the T-mobile tariff and they said that they can unlock my i-phone. still, can I still use it with my Italian sim card or my Uk card??? Keep in mind that I-phone has not arrived in Italy yet and I dont have O2 in UK... Thanks!!!!