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iPhone Bug Permits Calls from Lock Screen


iPhone Bug Permits Calls from Lock Screen

The luckless iPhone 4 seems to have been hit by another security issue. It seems that the latest version of the software, 4.1, contains a flaw that enables users to bypass the passcode feature, should you have that enabled. The flaw also works on the iPhone 3GS and iPhone 3G and is also in place on earlier versions of the firmware such as 4.0.1.

To see it in action, users just have to press the Emergency Call button, enter any three or more digits (do not use 999), press the call button and then straight away hit the lock button at the top. When you unlock you’ll then have access to the Contacts page, and from there calls can be made. From there, you can also access the Photo album.

This is of real concern to those who want to be sure their data is safe if they lose the phone, and pretty much defeats the purpose of having a pass code in the first place.

Hopefully this won’t mean a delay on iOS 4.2, which is scheduled for release in November, bringing with it Airplay and AirPrint.

Via: Engadget.


October 26, 2010, 7:35 pm

At times I wonder if they're making these bugs on purpose, 'just 4 kicks', as one might say, because there have been so many bugs...


October 26, 2010, 7:57 pm

I think you'll find Apple call this a 'feature'! :)

Just tried it on my iPhone 3GS (iOS v4.1) and it does indeed work.

However, I think it's a bit strong to say this makes the lock feature pointless. I know it's not a good thing and hopefully Apple will sort it out quickly (can't be that difficult?), but at least they can't access the entire phone, which would be a serious security issue!

Mikey uk

October 26, 2010, 8:05 pm

Nope. I'm on a 3GS, set a passcode (I dont usually use one), I can't make this happen according to the instructions in the article. As soon as I hit the lock button rapidly after hitting the call button having entered 3 to 5 digits, the screen blanks - locks - and when I hit either the big button or the lock button again, I'm back to a locked screen. More info please?


October 26, 2010, 8:41 pm

i havn't even bothered to upgrade to 4.1 yet. oh my oh..


October 26, 2010, 9:02 pm

I can't make it happen either. iPhone 3GS with iOS 4.1


October 26, 2010, 11:09 pm

@Mikey, apparently it only affects iPhone 4s. I've not been able to get it to work either. It does make you wonder about the QA process Apple has for iOS though. There's not exactly a ton of hardware buttons on the thing.


October 26, 2010, 11:21 pm

Yes, I can confirm it does indeed do this.

Also when in this mode to get my phone back to normal I had to do a reset, as the Lock and Home buttons become disabled, didn't wait for screensaver so that might have reset it.

@Mikey uk: I think you have to be really quick pressing the lock button after pressing Call, try entering a larger phone number even greater than 5, IOW: try and catch it while its dialling, a longer number may give you more time.

ps. I'm not jailbroken either.


October 26, 2010, 11:26 pm

Tempting as it might be to kick Apple again, I think the real lesson here is still: Don't leave your £500+ phone lying around FFS. ;)


October 26, 2010, 11:58 pm

iPhone 4 running 4.1... Indeed this works! I've just managed to do it on my handset.


October 27, 2010, 4:16 am

Yep made it happen with my 4G. Bit of a stupid bug, let's hope iOS 4.2 clears it up :)

Jay Pain

October 27, 2010, 8:24 pm

@Keith You don't have to reset your iPhone after the bug just make a call from 0 or any number and then end the call, it should show the lock screen again. It also works with iOS 4.02 on iPhone 4


October 27, 2010, 9:02 pm

@Jay Pain: To be honest never spent much time testing, thought I'd better reboot and remove the lock screen pass-code before I forgot. :)


October 28, 2010, 2:30 pm

Funny, if they can't get a basic lock screen correct I wonder what other security holes are lurking in that OS?

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