- There are a small number of iPhone settings
that can break your iPhone
or compromise your personal privacy.
Literally, we're not exaggerating.
Let's start in the settings app.
Scroll down and tap general and then tap date and time.
- What? Date and time could break your iPhone?
Yes, because it's the way that your iPhone handles security.
Security certificates online, your mail app,
and apps, they all use the date and time,
the current date and time to check to see
if the security certificate is valid.
If it's valid, it works.
If it's not valid, it just doesn't work
and it won't even tell you why.
So it's really important to have this set up correctly.
- Yeah,
so just leave that set automatically switch turned on.
That's it. That's all you have to do.
When you turn the switch off, as you just said,
a lot of different things can break
and you get no notification of it.
- No notification.
It's not like it's so you have the wrong time set
'cause the phone doesn't know.
You're in charge of what time it is on your phone.
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Small act of kindness goes a long way.
Next, let's talk about prevent cross-site tracking.
I'm gonna tap back to general, back to settings,
scroll down, and tap on Safari.
Gonna come down here to prevent cross-site tracking.
Why should we never turn this one off?
- Cross-site tracking means that
when you're on a website in Safari,
if you go to a different website,
that first website can track you
across all the other websites.
So usually these websites have a tracking pixel.
Google does it. Facebook does it. We do it.
Everybody does it! - Everybody does it!
- Yeah, but if you don't want that to happen,
if you don't wanna see ads for Airbnb on CNN
or vice versa, turn this off.
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please subscribe to this channel.
- Yeah, we're trying to get to 1,000,000 subscribers
before the end of the year, which was David's goal.
- Yeah, let's do it.
- Yeah I think we can do it. - We can do it.
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- We need your help.
- Let's go back to the main page of the settings app again.
Let's tap on mail next,
and a new iOS 15 setting here, privacy protection.
Tap on that. Protect mail activity, leave this switch on.
- Yep, remember we talked about tracking pixels,
like 30 seconds ago? - Yes.
- Well, they can be in your mail app too.
Usually it's a hidden pixel or an image,
like one by one pixel.
That's how they do it.
So that the image loads in your email app
that you don't see cause it's only one pixel,
but then Facebook knows that that image loaded
because it was loaded from their servers.
And so does Google and all these other places.
So that's how they track you.
This loads your mail through a proxy,
through Apple servers so they don't know
that you opened it.
- Especially if you sign up for an email list
and maybe they wanna sell that email list to somebody else,
and then all of a sudden,
if they have all this information about you,
you might start getting a ton of emails
from places you've never heard of,
places you never signed up for.
And it just fills up your inbox with spam.
- Yeah, I get a lot of emails.
David seems to know where his emails come from.
- Yeah, yeah.
- But mine, I have no idea where they come from.
I get emails all the time from people.
All it takes is one company to sell the list.
And I don't really know
if this is going to solve all those problems,
but it's a step in the right direction.
- Absolutely, next we're gonna talk
about some system services.
Let's go back to the main page of the settings app.
Tap on privacy, tap location services,
and tap on, come down here to system services.
We've got a lot of switches turned off here.
- We sure do. - If you want to know why,
card above, description section below.
But for now, why are we leaving
on emergency calls and SOS and find my iPhone?
- Well emergency calls and SOS, David,
we are experts here because if you're in an emergency,
you want them to be able to know where you are.
Leave this on.
Find my iPhone, Apple experts, if you lose your iPhone,
you can find it by leaving this one on.
- Yeah, and share my location,
maybe you have a kid and they get off the bus at 3:00
and you have to work till 5:00
and you wanna make sure that they got off the bus okay.
Make sure share my location is turned on on their phone.
You can actually confirm that they did get off the bus.
- Right, or at least their phone did.
Maybe they handed it to their friend and said-
- They tossed it, tossed it out the window
in the front of the driveway. - Yeah!
- Next let's go back to the main page of the settings app.
Just tap these back buttons,
upper left-hand corner of the screen,
scroll down, and tap on messages.
And come down here, you'll see send as SMS.
You got MMS messaging, group messaging.
Why are we leaving these switches on?
- Well, SMS is just text messaging.
It should say like send text messages.
Cause if you turn this off,
you're not going to get text messages.
MMS, back in the day, 2002,
we were sending picture messages.
If you have a friend with an Android phone
and they send you a picture,
it's not going to come through
unless MMS messaging is turned on.
Same thing with group messaging.
You're not going to be able to get group texts.
However, I guess maybe you would wanna turn that one off.
- Maybe that's a benefit sometimes.
- Especially in the holidays. - Yeah.
Those are some iPhone settings you should never turn off.
Thanks for watching this video.
Give it a thumbs up if you enjoyed.
Subscribe to this channel, join this channel.
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Once again, thanks for watching.