1.I phone 2.jailbreak iphone 3. from cydia install IFILE repo : xSellize Repo 4. iFunBox ( <Bạn vui lòng đăng nhập hoặc đăng ký để xem được nội dung này!> ) 5. commcentreclassic file INSTALL IFILE FROM CYDIA. Connect iphone to PC then open ifunbox go to : raw file system/System/Library/Frameworks/CoreTelephony.framework/Support/ delete commcentreclassic and copy commcentreclassic ( with i have sent it for u ) close ifunbox. Open ifile and go to : System/Library/Frameworks/CoreTelephony.framework/Support/commcentreclassic click the Blue arrow next to the file name, go to access permissions, you'll get user group and global and : set like this: User: mark writing, execution and reading Group: mark reading and execution Global: mark reasons and execution go to cydia install ultrasn0w and put simcard and reboot your iphone and should work Tested on iphone 3Gs Download: