hien minh dang co 1 con iphone 3gs minh dang xai mang at&t ,may co firmware 3.1.2 va 5.11.07,tuan 47,model mc133 ,minh da cai cydia roi vay minh muon unlock iphone nay minh phai lam the nao xin cac ban chi dan chi tiet tung buoc cho minh ,thanh that cam on nhieu