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The one way to know your iPad or iPhone has a virus

Anyone who uses Apple gadgets probably already knows that Apple runs a pretty tight ecosystem. iOS only runs on Apple hardware and Apps are only available from the Apple App Store - unless your gadget is "jailbroken."

What's "jailbreaking"? It's an off-warranty option for tinkerers and techies to unlock under-the-hood options on iOS devices.

Now, you know your smartphone is already capable of amazing things. That phone in your pocket or purse has more computing power than the computers that put us on the moon!

But some folks want their phones to do even more. When you first get a new iPhone, it comes preloaded with apps and programs that are difficult and sometimes impossible to remove.

Some people get frustrated with their phones, and others find a way around the restrictions. Getting around these software restrictions is called jailbreaking your phone.

And jailbreaking your iPhone could do more damage than you bargain for. For example, a jailbroken app called KeyRaider allowed data from more than a quarter million accounts to be uploaded to a database, including users' Apple passwords. Scarier still, KeyRaider also lets hackers lock the iPhone or iPad remotely and demand a ransom from the user.

This is yet another reason we strongly encourage you not to jailbreak your iPhone or iPad. KeyRaider primarily affected iPhone users in China, but malware attacks can come anywhere at any time.

So lesson number one is, don't jailbreak your iPhone or iPad. But don't get too confident yet. Even stock, non-jailbroken Apple gadgets have been vulnerable to hackers.

Next page: Attacks on non-jailbroken stock iPhones and iPads
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