Since Apple's iOS 7 (7.0) was released Sept. 18, users have reported problems with the radically different software. While the iPhone 5s and 5c (released Sept. 20) were shipped with this latest mobile operating system, users of the iPhone 4 and up, iPod Touch (fifth generation), iPad 2 and up and iPad Mini had to install it. The new software did away with the skeuomorphism of previous versions, and introduced many new features.

However, the upgrade has not been without a few hiccups, as users and hackers report several problems with the new software. An iOS 7 update (7.0.1) for iPhone 5s and 5c only was released Sept. 19, while another updated (7.0.2) for all compatible iOS devices was released Sept. 26. Here are the top 5 iOS 7 issues and how to fix them:

iOS 7 Issue #1: Blue Screen Of Death bug

The Blue Screen of Death meme refers to the error screen displayed by operating systems after a crash. Since it's a problem usually associated with older Windows PCS, iPhone 5s users have been shocked to find that their latest iPhone actually flashes blue before rebooting itself. So far, only iPhone 5s users have reported experiencing this problem, The Verge reported. The problem generally arises when users have Apple's own iWork apps open and multitask between apps.

The fix: Since this iOS 7 issue is largely caused by using Apple's iWork apps, one fix is to disable iCloud syncing for Apple's Pages, Keynote, and Numbers apps, per The Verge.

iOS 7 Issue #2: Call any number from a locked iPhone

Forbes previously reported that an iOS bug allows anyone to call any number from a locked iPhone simply by tapping "Emergency" on the lock screen, which brings up an emergency calling screen. Then he or she can dial any number and rapidly tap the call button, causing the iPhone to crash and automatically call that number when it turns back on. While the latest iOS update (7.0.2) was supposed to fix this problem, it has simply made it a bit harder to call any number from a locked iPhone.

This latest Lock Screen bug in iOS 7.0.2 was discovered by Dany Lisiansky, who posted a video of the bug to YouTube, MacDailyNews reported. To reproduce this bug, you need to get a notification on the lock screen, such as a text message. Start swiping the notification right, while sliding the camera icon up slightly. Hold onto the camera icon, and tap the Emergency call button. After typing in the number you wish to call, press the call button 2-3 times rapidly.

The iPhone will then show the black start screen with the Apple logo in the center and call the number you dialed. iDigitaltimes tried this hack a few times and was successful each time. This iOS 7 bug worked when calling someone from the phone's contacts but also a number that wasn't in the phonebook.

The fix: Like the previous Lock Screen bug that was supposedly fixed with iOS 7.0.2, there doesn't seem to be a fix for this bug. There isn't apparently a way to disable the Emergency calling feature, and even if there was, it wouldn't be a good idea to do so.

iOS 7 Issue #3: Lock Screen bug allows anyone to hijack photos, email, or Twitter

Forbes reported that an iOS 7 bug allowed anyone to bypass a lock screen by swiping up to access the phone's Control Center, and then opening the alarm clock. Holding the phone's sleep button brings up the option to power it off with a swipe. But the hacker can tap "cancel" and double click the home button to access that phone's multitasking screen, as demonstrated by a Jose Rodriguez's video. From there, the intruder has access to the iPhone's camera and stored photos, along with the ability to share those photos from the iPhone owner's accounts, essentially giving the intruder the ability to hijack the user's email, Twitter, Facebook or Flickr account.

The fix: Install the latest iOS 7 update (7.0.2), which fixes this issue. However, to play it extra safe you can also turn off Control Center access on Lock Screen by going to Settings > Control Center and turn off access on Lock Screen.

iOS 7 Issue #4: Forced log-outs of popular apps

Apple should understand that constantly typing a password is annoying, after all the company introduced the fingerprint sensor to replace the passcode. But a purported iOS 7 bug has been logging people out of popular apps such as Mailbox, Snapchat and Paypal, as well as Loom. Which means that affected apps would ask you to login or set up your passwords over and over again.

The fix: The new iOS 7 feature Background App Refresh, which updates your apps for you automatically, is the suspected culprit to the problem. For now, you can go to Settings > General > Background App Refresh and disable the feature for all affected apps. But then, you should check for latest versions of the app, as the developer may have fixed the issue themselves.

iOS 7 Issue #5: New design is making people feel sick

The iOS 7 design is dramatically different from previous mobile OS versions, but the change has caused some users to feel something akin to motion sickness. "The zoom animations everywhere on the new iOS 7 are literally making me nauseous and giving me a headache," starts one thread on Apple's discussion forum. The navigation animations and the parallax function that causes the background of the phone to move back and forth depending on how the user holds their Apple device are being blamed for making people feel sick.

The fix: To possibly alleviate some feelings of nausea, go to Settings > General > Accessibility then scroll down to Reduce Motion and turn it on. Or, you could always Stop Looking at Your Phone Every 5 Seconds!

Have you experienced any iOS 7 issues? Let us know in the comments.

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