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  A comparison of Telstra's 4G phones

  A guide to Telstra's three 4G smartphones on the market.

• Untethered jailbreak for iOS 5.1.1 available for download

  Absinthe 2.0, the jailbreak for iOS 5.1.1, is ready and available for download, the Jailbreak Dream Team announced at the Hack in the Box conference in Amsterdam.

• Preview: LG Optimus LTE2

  The LG Optimus LTE2 is the first smartphone to come with 2GB of RAM.

• Unthethered jailbreak for iOS 5.1.1 available for download

  Absinthe 2.0, the jailbreak for iOS 5.1.1, is ready and available for download, the Jailbreak Dream Team announced at the Hack in the Box conference in Amsterdam on Friday.

• Smartphones with quad-core chips and 4G LTE coming soon

  Quad-core processors have not yet been combined with 4G LTE in smartphones, but that could change soon.

• How to create custom notification tones in iOS 5

  Apple's latest iOS 5 operating system for iPhone, iPad and iPod touch devices went live last week and one of its new features is custom notification tones.

• Smartphone security: Keep your handset safe

  Once upon a time, a phone was just a phone: It simply made and received calls. The only security you worried about was if someone had picked up in the other room to listen in.

• BlackBerry 6: Wipe Your Smartphone, Restore Factory Settings

  Many reasons exist for why you might want or need to "security wipe" a BlackBerry, or completely erase all personal data stored on your handheld: You got a new smartphone and plan to retire the older device; you're trading in your existing BlackBerry for a new one from your wireless carrier; you and a friend are swapping devices; you loaded too many applications or media and just want to start over from scratch; etc.

• 7 smartphone disasters that could happen to you

  Like all technology, smartphones can be hugely useful. However, some of the time they provide opportunities for tech-tinged embarrassment. We tracked down seven of the most unfortunate mobile phone disaster tales we could find. The stories are fun to laugh at now, but most of them were anything but amusing when they actually occurred...

• How to restore an iPhone

  QUESTION I've bought a number of apps for my Apple iPhone via iTunes and the App Store. To avoid draining the battery by downloading apps directly to the handset, I'd like to connect my iPhone to my Windows XP PC using USB and transfer them over. However, when I connect the phone its icon doesn't appear on the desktop (although it does charge up). I've tried updating iTunes, restarting the PC and using a different USB port, all to no avail.

• Five things we hate about the HTC One X

  The HTC One X is definitely one of the best Android smartphones money can buy right now, but does that mean it's perfect? Certainly not.

• In pictures: Nokia Lumia 900 unboxing

  We go hands-on with Nokia's new flagship Windows Phone, the Lumia 900.

• In pictures: Samsung Galaxy S III

  Samsung has unveiled the Galaxy S III Android phone.

• Smartphone screens are getting bigger

  Smartphone screens are getting larger, although vendors will likely continue to offer many sizes to woo a wide variety of users.

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  Analysis: Why Linux is a desktop flop

  It's free, easier to use than ever, IT staffers know it and love it, and it has fewer viruses and Trojans than Windows.

Whitepapers about smartphones

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  Web Security Services: Delegating Security Responsibility to the Cloud

  Few readers need to be told that the Internet is a dangerous place. Anyone in the IT field is aware that viruses, spam, and malicious Web sites exist. Knowledge of these attacks and vulnerabilities was the domain of specialized security gurus just a few years ago. But the need to understand computer security has spread beyond the domain of specialists. Today, even IT end users need to be aware of threats and countermeasures to some degree.

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  Prepare Your Enterprise for the Mobile Revolution: Boost the Bottom Line with Mobile UC

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  Improving Productivity in the Connected Enterprise Through Collaboration

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  New Mobility Requires a New Network Strategy