iOS 4.1 bug – allows users to make phone calls while device is locked!

iOS  4.1 security flaw
iOS 4.1 security flaw

A security flaw discovered in Apple’s iOS will allow unauthorized users access to the dialing screen on an iPhone running iOS 4.1 (the latest version). This flaw is a big one! Anyone who has password protected their iPhone to prevent calls being made if their device is misplaced or stolen are  wide open to unauthorized access.

The flaw does not however allow access to the home screen, so it seems that your apps are safe enough, it is just making calls that’s as easy as described below! This  is not the first such security flaw Apple have had, and one they could do without!

All that needs to be done to make a call if the iPhone is passcode protected is the following:

  • Press the Emergency Call button, enter a non-emergency number such as ###
  • Tap the call button and immediately hit the lock button.
  • The iPhone’s dialing screen, from which calls can be made is now visible!

[Source and quoted in part]

Turn off simple Passcode on your iPhone for better security – iPhone 101 series

If you think think it’s a little too easy for someone to guess four digit numeric password, you might want to consider disabling “simple passcode”. Disabling simple passcode means you can use a full keyboard to create a password of your choice. If you have iOS4 running on your iPhone then it is easy to do this.


1. You need to open the settings app on your iPhone, under the General heading select “Password Lock”, if this is currently enabled you will be prompted for your current password, enter it.

2. You will now see the “Simple Passcode” which is turned on by default, if you switch this to off, you will be prompted for a full keyboard password, you will need to confirm your old password first if you had one.

3. Select your password, and confirm it. You are now using the more secure password of your choice. You can also change the “require password” time for a length of time that meets your needs. There is more on using passcodes in this post.

iPhone 101 is a series of blog posts by that makes no assumptions. If you are new to smart phones, iPhones or mobile phones, you will find this guide straight forward to use.