Spencer Webb, president of antenna design and consulting firm AntennaSys, has written a nice explanation of how cell phone antennas are designed and tested, and how this may play into the reception problems iPhone 4 users are experiencing when holding the phone in certain ways. follow link
Type an em-dash on an iPhone
Typography and punctuation geeks rejoice! It's easy to type an em-dash on the iPhone's or iPod touch's virtual keyboard. To do so, tap the .?123 key to switch to the numeric keypad. Then touch and hold on the Hyphen key to reveal a pop-up strip showing an em-dash. Slide to the em-dash and release your finger.
Note that this basic trick works with many other keys on the virtual keyboard.
- ExtraBITS for 28 June 2010 (28 Jun 10)
More Details on the iPhone 4 Antenna Issue