Aporte original por: Ahmad Zulhilmi Rosli ,
To those experiencing iPhone stuck on Apple logo with empty progress bar, here is my '''SOLUTION''' . I assume that you experiencing stuck on Recovery Mode. # Download and Install 3utools. Run the 3uTools as well. # Connect your iPhone to your PC. # 3uTools now will prompt either '''Exit Recovery Mode''' or Flash (if I am not mistaken). Choose '''Flash'''. # Choose your latest iOS version and '''Start Flashing'''. # If 3uTools stuck at 10% which shows Entering Recovery Mode. Kindly remove the lightning USB from your phone for 3 seconds and put it back in. # After that, if 3uTools stuck at 19% (restoring), kindly do the same steps as above which is remove the lightning USB from your phone for 3 seconds and put it back in. # After that you will find the percentage is start moving from 20% until the end. Then your iPhone is good to go! This problem occurs when your iPhone changing state (ie, Normal Mode to Recovery Mode), your iPhone is actually disconnected from the PC that's why the progress bar is not even move. By remove the lightning USB from the iPhone and put back in, this allow your iPhone "reconnects" back with PC and the software can start uploading firmware to your iPhone.