How can I unlock my iPhone if I forgot the passcode?
How do I replace the battery in the iPhone 4 and iPhone 4S?
How can I transfer or copy music, photos and videos from my iPhone to my computer?
How do I reboot or restart a "frozen" or "hung" iPhone? How do I reboot or restart a "frozen" or "hung" app or otherwise "force quit" an app?
How do I replace the battery in the iPhone 5?
How do I fix my iPhone if it will not turn on, turn off, or wake up?
How do I replace the glass cover, digitizer and display (LCD screen) on the iPhone 5c and iPhone 5s?
Why won't my iPhone play a particular song or video? Why isn't a song or video visible? Why won't my iPhone play some songs and videos that will play on my Mac or PC?
How do I replace the glass cover, digitizer and display (LCD screen) on the iPhone 5?
Why does my iPhone run out of power so quickly? How can I conserve battery life?
For all iPhone Troubleshooting & Repair Q&As, check out the iPhone Troubleshooting & Repair Q&A (Home). Also see the iPhone Q&A for answers to dozens of other iPhone questions. For other Apple hardware, visit the EveryMac.com Q&A section.