Wednesday, January 24, 2007

Samsung SGH-D600

Samsung SGH-D600 - successor to the Samsung SGH-D500, and differs from it with a slightly revised look, a higher resolution camera which is located outside the sliding area instead of inside, TV output, and support for microSD external flash memory cards. It also incudes a Picsel Viewer for Microsoft Office documents.

Battery

Stand-by up to 300 hours and Talk time up to 7 hours.

Camera

2 Megapixel digital camera (1600x1200 pixels resolution) with a flash and MPEG-4 video recording (at up to CIF (352x288) resolution).

Tuesday, January 23, 2007

Driving and mobile phones

Mobile-phone use while driving is common but controversial. While few jurisdictions have banned motorists from using cell phones while driving outright, some have banned or restricted drivers from using hand-held cell phones while exempting phones used by a hand-free method. It is generally agreed that using a mobile phone while driving is a distraction that brings risk of road traffic accidents. However, some studies have found similarly elevated accident rates among drivers using hand-held and hand-free phones, suggesting that the distraction of a telephone conversation itself is the main safety problem.

Use of handheld mobile phones by drivers is illegal in most European countries . Use of hands-free mobiles is permitted. Similar laws exist in the U.S. states of New York, Connecticut, and California. In the UK it has been an offence since December 2003 and carries a fixed penalty of £30 rising to £1000 if convicted in court.

Mobile phone history

Most current mobile phones connect to a cellular network of base stations (cell sites), which is in turn interconnected to the public switched telephone network (PSTN) (the exception are satellite phones). Fully automatic cellular networks were first introduced in the early to mid 1980s (the 1G generation). The first fully automatic cell phone system was the Nordic Mobile Telephone (NMT) system, introduced in 1981.

Prior mobile telephones (the so-called 0G generation), such as Mobile Telephone Service, date back to 1945. These were not categorized as cellular phones, since they did not support handover, i.e. automatic change of channel frequency in the middle of a call, when the user moved from one cell (base station coverage area) to another.

Until the mid to late 1980s, most mobile phones were sufficiently large that they were permanently installed in vehicles as car phones. With the advance of miniaturization, currently the vast majority of mobile phones are handheld. In addition to the standard voice function of a telephone, a mobile phone can support many additional services such as SMS for text messaging, email, packet switching for access to the Internet, and MMS for sending and receiving photos and video.

Mobile phone manufacturers include Apple Inc., Audiovox, Benefon, BenQ-Siemens, High Tech Computer Corporation, Fujitsu, Kyocera, 3G, LG, Motorola, NEC, i-mate, Nokia, Panasonic (Matsushita Electric), Pantech Curitel, Philips, Sagem, Samsung, Sanyo, Sharp, Siemens, SK Teletech, Sony Ericsson, T&A Alcatel, and Toshiba.