i had my iphone cracked for like a month then i got curious and tryed updating to 1.1.1 and well i failed at that installed oktprep and tryed goin to 1.1.2 and well that failed at activating my tmobile sim so i have virginised my fone and started from square one so what method should i follow for the easiest way to get my iphone back i still get a error when i use the att sim