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Ever send a message with invisible ink to a friend? Now with the Black SMS app, text messages can be encrypted and decrypted easily by any iPhone owner with the right password. Once Black SMS is installed on your iPhone, the secret message is simply typed into the app and a password assigned.

Copy and paste the message into an SMS or email message, then send away. Just make sure you share the password with your recipient, because otherwise nobody will be able to read your message. Black SMS uses Advanced Encryption Standard for serious security, even though the app is simple to use and only costs $0.99 in the App Store.

Jailbreakers who feel like they're missing out on the new iOS 5.1 camera icon can now add their own with a new jailbreak tweak. Camera Grabber for iOS 5 adds the camera shortcut to your iPhone's Lock Screen without having to upgrade to iOS 5.1. This eliminates the need to double tap the Home button to quickly access your camera.

If you do not want the new icon but would like an easier way to access your camera, you can always install the free tweak known as CamFast. This tweak allows you to use Activator actions like "Double Tap" to achieve the same result as using the camera shortcut.

Sprint's existing contract with Apple will make it possible for the wireless carrier to sell the next generation iPhone, widely expected to launch with LTE 4G connectivity. Reports that an LTE iPhone would cause problems for Sprint may have been exaggerated. Sprint's chief financial officer, Joe Euteneuer, told investors that LTE network development is underway.

Sprint expects to roll out LTE to six major markets by mid-2012, covering 100 million people in the US. Euteneuer said the process will continue until most major markets are covered by LTE this fall, which is when Apple is expected to launch the next iPhone. The remarks published in Dow Jones Newswires claims that Sprint will not be disadvantaged at all when compared to Verizon and AT&T.

iMessage may make it simpler to communicate between iOS devices and an OS X computer, but there are many file types that can't be transferred using the service as they are unsupported by Apple. For those iPhone users with jailbroken devices, this is no longer a limitation.

SendAny and ReceiveAny are two complimentary iPhone tweaks that open up the doors of iMessage to any file type you care to send. These files can be sent to and from jailbroken iOS devices or between an IOS device and an OS X computer running iMessage beta. Not only this, but SendAny includes built-in DropBox support to send files directly to online storage.

The idea that SIM cards could disappear is looking less likely, as smartphone manufacturers RIM, Nokia and Apple have submitted competing proposals for a next-generation subscriber identity module. The European Telecommunications Standards Institutes (ETSI) has scheduled a vote to decide between the competing designs.

Apple's proposed nano-SIM card is pictured above from The Verge, inside the outline of a standard SIM card. When it comes down to it, the Apple design is much like current micro-SIM cards, except with less plastic around the edges. In contrast, both competing designs from Nokia and RIM are redesigned more like an SD card.