Tips

Surprise! The popular iPhone app Yelp has a secret feature that overlays nearby points of interest on live video of your surroundings. This augmented reality feature is available in Yelp version 3.0.0 on iPhone 3GS.

To turn on the feature, called Monocle, make sure "Location Services" are ON. Launch Yelp and select the "Nearby" screen from the bottom menu. Now gently twist or shake the iPhone a few times until the dialog box stating "The Monocle is activated" appears.

Users are reporting a bug in iPhone firmware 3.0 that prevents photos from appearing on the camera roll. Although image files are present on the device and can be copied with iPhoto, thumbnails are hidden on the camera roll.

The camera roll even counts the correct number of photos as it hides a portion of the files. Users have determined the problem arises when numbers in photo filenames exceed 10,000. For some reason the iPhone OS 3.0 camera roll does not display these files.

Now that you have your shiny new iPhone, should you spend another $99/year to subscribe to Apple's MobileMe service? MobileMe has replaced Apple's former .Mac service and now includes many useful features for iPhone users.

Apple is offering a free 60-day trial of the service, which includes 20GB of iDisk storage and 200GB of monthly file transfer bandwith. Here are some iPhone-specific features of MobileMe.

Sometimes waiting for automated phone menus and dialing extensions can be a real drag. Luckily, the Apple iPhone has an easy way to automatically dial extensions when needed.

All you need is the contact you're trying to reach and the relevant phone number and extension you'd like to add to the contact information.

Did you know that when you email a photo from the camera roll on your iPhone, the resolution of the picture is automatically degraded to 800x600? This makes sense if you don't need to send anything at a higher quality resolution.

But what if you need to send the full resolution photo? The original iPhone and iPhone 3G both take photos at 1600x1200 resolution. The iPhone 3GS with its auto-focus camera takes photos at 2048x1536 resolution.