6
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 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

McLaren P1: Harbinger of the hybrid supercar revolution (CNET On Cars, Episode 58)
23:31 January 30, 2015
McLaren P1 on the track and on the street, CNET Style. How engines get their names and what it means. Also: CNET's Top 5 cars of last...
Play video
Boost's ZTE Speed is a 4.5-inch, low-priced Android
1:07 January 30, 2015
Featuring a 5-megapixel camera, a quad-core CPU, and a 4.5-inch display, the ZTE Speed is one of Boost's prepaid bargain Androids.
Play video
The LaCie Mirror is perfect for narcissists
2:14 January 30, 2015
CNET editor Dong Ngo totally likes what he sees when looking at the one-of-a-kind LaCie Mirror portable drive. And that's because (you...
Play video
Rid your Android quick settings menu of oddball toggles
1:17 January 30, 2015
CNET's Dan Graziano shows you how to fix one of the most annoying features in Android 5.0 Lollipop.
Play video
Beats Pill XL: Bigger Bluetooth speaker justifies its premium price
1:25 January 30, 2015
We weren't such big fans of Beats' original Pill, but the company's jumbo-sized model is well designed and performs much better.
Play video
Facebook using beacons to show location 'tips'
2:50 January 30, 2015
Social network's new app feature sends location tips to your feed using GPS, Wi-Fi and Bluetooth beacons. Meanwhile, your home Internet...
Play video
Testing out 'Insane Mode' in the Tesla P85D, Ep. 190
4:28 January 30, 2015
This week we get all nostalgic with the Prynt smartphone case that makes your iPhone work like a Polaroid camera, we learn some scary...
Play video
Nvidia G-Sync is a smooth move for PC games
3:01 January 30, 2015
The right graphics card and a G-Sync monitor can make games look better.
Play video