This content is rated TV-MA, and is for viewers 18 years or older. Are you of age?
Sorry, you are not old enough to view this content.
How To Video: Wipe and reinstall your iPhone's OS for resale
About Video Comments (0 ) Transcript

How To Video: Wipe and reinstall your iPhone's OS for resale

2:21 /

Whether you're looking to sell your iPhone and you accidentally deleted the operating system, or you want to downgrade from iOS 4, Device Firmware Update mode will help you out. Getting into it is simple yet tricky, so here's guidance on a fast way to wipe and restore your iPhone.

-Whether you're looking to sell your iPhone and you accidentally deleted the operating system (I'm looking at you, jail breakers), or whether you want to downgrade from iOS 4, DFU Mode is the place you want to be. Hi, I'm Seth Rosenblatt for CNET, and today I'll be showing you how to restore an iPhone OS which involves a little jaunt into a Device Firmware Update Mode. DFU Mode is different from Recovery Mode. It skips over the current operating system and will allow you to upgrade, downgrade, or just reinstall the OS, and it will wipe any and all data that's on the phone. It's as close to factory fresh as a used phone can get. So, before you start mucking about, be sure you've backed up everything. Start iTunes then connect the phone to your computer. Do not format the drive if your computer asks you to. Tap the Sleep/Wake button at the top to turn the screen off. When you're holding the Home button down, hold the Sleep/Wake button at the same time for exactly 10 seconds, then release only the Sleep/Wake button. Keep holding the Home button until a message appears on iTunes saying that, "An iPhone in Recovery Mode has been detected." Then you can restore iOS or make whatever other changes you're planning on. DFU can be tricky to get into. The easiest way to tell is if your iPhone screen is completely black. If you see any kind of icon on the screen, it's not in DFU Mode. Start over and keep at it until you get it. Also, if you're an OS X 10.6.5 user, there's a known bug that prevents Macs from detecting phones in DFU Mode. Connecting through a USB hub, finding a Mac on 10.6.4 or earlier, or finding a Windows computer ought to work until the bug's fixed. So that's how to get your iPhone into DFU Mode. Remember that precise 10-second count: one Steve Jobs, two Steve Jobs, three Steve Jobs, four Steve Jobs, five Steve Jobs, six Steve Jobs, seven Steve Jobs, eight Steve Jobs, nine Steve Jobs, ten Steve Jobs, release, and hold.

New releases

Swap your iOS 8 keyboard for these...
0:59 September 19, 2014
With iOS 8, you can use a different keyboard than the default. Check out these third-party alternatives.
Play video
2015 Dodge Challenger R/T Scat...
5:50 September 19, 2014
The 2015 Dodge Challenger R/T Scat Pack has the muscle car power (and fuel economy) to back up its nostalgic...
Play video
Compact, budget Samsung Galaxy...
2:01 September 19, 2014
This wallet-friendly Android phone fits nicely in the hand, but has a few drawbacks you'll want to know about...
Play video
Line up for an iPhone 6, get a...
2:11 September 19, 2014
Why do people wait in line for days at Apple stores for the latest iPhones when they could preorder online?...
Play video
3D Pocketcopter crowdfunding soars...
5:13 September 19, 2014
This week on Crave it's your last chance to order a Pocketcopter that doesn't exist, run for your lives from...
Play video
The Blendtec Designer 725 is too...
2:33 September 19, 2014
A significant design flaw keeps us from recommending this high-end appliance
Play video
Genius hacker Walter O'Brien tells...
3:11 September 19, 2014
When Scorpion makes its debut on Monday night, it will bring hacking and computer security to prime time like...
Play video
The hidden features inside iOS...
2:04 September 19, 2014
Brian Tong shows you the features inside of iOS 8 that you might not know about.
Play video