How do I reset a used iPhone 4?

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Daily Answer is excerpted from the JustAnswer archives and features information provided from a Expert on JustAnswer.

Q: I have an old iPhone 4 that I want to reset. How do I do it? I put the sim card from my phone in it, but it says phone is locked and I can't do anything.

A: You will have to restore the iPhone to a base firmware install, which will erase everything on the iPhone, but you can later restore the contents of the iPhone to a backup that you have on the computer (the same computer you used in the past to sync the phone with). Try these steps:

  • Press and hold the top power button until the iPhone turns off.
  • Connect the iPhone to the computer that you have been using the phone and iTunes with.
  • Hold down the HOME button on the front while pressing the Power button (continue holding the home button).
  • Continue to hold the HOME button until you see the "Connected to iTunes" message.
  • In the Summary tab, click Restore and follow the prompts. (This will erase everything on the iPHone and make it just as it was when the phone was first purchased.)
  • Once that is complete, right click the iPhone listing in the left panel of the iTunes window.
  • If you do not want to restore the information on the iPhone from a backup, you can stop here. No need to continue. Otherwise choose "Restore from Backup."
  • Choose a backup date and restore.

Now your iPhone will be back up and have all the restored information from your last sync.

-- Answer from Jason Jones, computer specialist on JustAnswer.