- DFU stands for Device Firmware Update.
It is the deepest type of restore you could do on an iPhone
and the last step in determining whether
it's a software or a hardware problem,
that's causing whatever issue
you're having with your iPhone.
If a DFU restore doesn't fix the problem,
it's a hardware problem.
- Before you put your iPhone in DFU mode and restore,
we strongly recommend saving a backup to iCloud, iTunes
or find those link
in the section below the subscribe button,
walking you through each of those steps.
When you put your iPhone in DFU mode,
every single line of code is erased and reloaded,
so your iPhone is gonna be like,
it's fresh outta the box. - Out of the box.
If you have no backup, you're losing all your information
when you do a DFU restore.
- Does it disable iCloud activation lock? No.
So if you just stole somebody's phone, you're outta luck.
This isn't gonna work,
but this will work to DFU restore your iPhone.
- Yes. So first we'll explain how to do it
and then we'll actually do it.
So iPhone 8 or newer, these are the steps.
Even an iPhone 7 or older, we've got an older video,
card above, description section below.
So to do it, quickly press and release the volume up,
quickly press and release the volume down,
press and hold the side button until the screen goes black.
Once the screen goes black,
keep holding that side button
and then press and hold the volume down button.
You've got both buttons holding down,
count to five, keep holding the volume down button,
let go of the side button until your iPhone
shows up on your computer, right.
So take out your lightning cable.
I'm gonna plug that in.
- Just plugging it into his Mac, ladies and gentlemen.
It's off screen, but there you go.
- There we go.
Volume up, volume down, press and hold the side.
- [David] We're waiting for the screen to go black.
- Yep.
Black, press on the volume button.
two, three, four, five,
let go the side button,
keep holding the volume down button
and.
- Just keep holding it.
This is where you don't wanna give up.
- There we go. How about that?
- [David] Wow. First try.
- [Instructor David] Once it shows up on your computer,
let go of the side button, put your phone down,
don't unplug it.
- Don't unplug it. Yep.
If there's anything on your iPhone screen,
you're not in DFU mode. - Yep.
If the screen is black, you are.
If you're not in DFU mode
don't hold yourself to this standard, okay?
Like he just did it on the first try.
I think that's the first time we've ever made a video.
- Yeah, we often have problems recording,
the last time it took us like 30 minutes
cuz we were doing something wrong
and there was an issue with the cable.
- We're experts.
- We're experts now.
- But now that he's 28 years old.
Zach ready?
♪ Happy birthday to you ♪
♪ Happy birthday, dear David ♪
♪ Happy birthday to you ♪
- There we go. - How about that? We got the..
- So your Mac has been detected.
Your Mac has detected an iPhone in recovery mode.
You must restore this iPhone before it can be used,
click okay.
And then you'll just come in here and click restore iPhone.
- [David] Yeah, that's right.
- Now, I don't wanna actually put my iPhone
in DFU mode right now,
so you can get out of DFU mode, exit it
by forming a hard reset on your iPhone, so.
- You can unplug it too.
- This is gonna sound familiar,
volume up, volume down, press and hold the side
- [David] And wait, and.
- [Instructor David] And just keep holding that side button
until the apple logo appears on the screen.
- [David] Incidentally, as David said,
how to do a hard reset.
We've just noticed that it's disappeared from David's Mac
- [Instructor David] And there is apple logo.
How about that.
- So after you DFU restore your iPhone,
when you see the hello screen on the iPhone,
if you have an iCloud backup,
unplug it from your computer
and just use the phone to set it up.
If you have an iTunes backup,
you can continue with the process
and in fact, you can just leave it connected
and go through the process.
In this case, the computer is just a tool
that you're using to DFU restore your phone
so you can use your friends or your own,
it's got nothing to do with iTunes syncing
or anything like that.
- Yeah. If you run into issues, a couple things to try,
different ports on the computer,
maybe something's gunked up in one of the ports,
try a different port, try a different cable.
- Indeed.
- Or you might need to clean out
the charging port of your iPhone
And if there's pocket lint or gunk in there,
it might not make a clean connection to your phone,
in which case, you won't be able to put it in DFU mode.
- Right. And different computer
and one more thing, antivirus software.
If you have antivirus software and you're a PC user
turn it off
because that can jump in the middle of this connection
and say like, oh, I gotta scan this thing now,
I'm Norton and it will interrupt the process
and just keep kicking you outta DFU mode.
- Yep. And now if your phone was
totally blocked, totally off,
you try to put it in DFU mode
and it didn't show up in your computer
and you've tried several times,
your phone just is probably totally broken.
You know, usually that happens, you know,
water damage or you dropped it in really hard surface
over and over again.
So if that's your issue, I'm sorry, we can't help you.
Apple Store.
- Leave an angry comment below.
Say you guys,
you should be able to help me rescue my smashed,
water-logged iPhone
and for the love of God, join this channel please.
- The other comment we get a lot too is
why can't I bypass iCloud activation lock
and sorry.
- Yeah. There's there's just no way to do it.
Yeah, you can't do it.
It's not by iCloud activation sometimes lock.
- Yeah. (audience laughing)
- It's just lock.
- As you said, join this channel, get custom badges,
emojis and help us.
Member shout-outs helps us tremendously.
- [David] Yeah. This is how we make these videos
is through your support.
For instance, we just invested
couple thousand dollars in a lens that we're using
to do some of the shots here of David's shoulder
that were really good.
- [Instructor David] The side cam.
- [David] Yep. That's a $2,500 lens
making that, see that shoulder shot right there.
- Looks great. - Looks great.
Look at that.
- How about that?
- That's thanks to you and your membership dollars.
- Thanks for watching.