PDA mobile phones means the handsets, which are capable of providing computer type performance. The main character features of a PDA gadget are that, it supports computer based packages like window operating system, MS office, internet web browser, window media player, high speed processor etc. But the PDA phones can not be considered as a complete replacement of a computer system.
Almost all the leading mobile brands like Nokia, LG, Samsung, Sony Ericsson etc. has launched many PDA mobile phones in the market during some couple of years. Some of the PDA handsets of the leading brands are Nokia N900, LG GM750, Sony Ericsson Xperia X10 etc.
The first handset is the quad band 2G plus tri band 3G HSDPA handset of Nokia. The handset has got a display resolution of 800 * 480 pixels with its 3.5 inches TFT screen with touch sensitivity. The gadget supports 16M colors. The screen also has got an accelerometer sensor for auto rotating picture and proxy sensor for turning the handset display on or off. The full Qwerty keyboard of the widget carries softer keys (navigation, functions, numeric and alphanumeric keys). The handset has got huge memory capacity of 32 GB. This memory can be enlarged upto 48 GB by using micro SD memory card in the external memory slot of the widget. The handset support Maemo v5.0 operating system. The handset has got ARM Cortex A8 600 Mhz. Processor. Mobile versions of computer based applications like Real one player, Adobe flash player 9.4, Mozilla firefox browser and Pocket Office (MS Office, Excel, Pdf and powerpoint) are also found on this widget. The handset has got camera of 5 MP size with numerous features like auto focus, Dual LED flash & video light. The other entries in this cellphone are downloadable games, Stereo FM radio, internet technologies (GPRS, EDGE, HSDPA, HSUPA, Wi-Fi), 3.5mm earphone socket etc.
The next handset is also based on quad band GSM plus tri band 3G HSDPA technologies. The handset supports windows 6.1 professional operating system and other windows based programs like Microsoft office (mobile version), media players supporting multiple music formats, Internet explorer (mobile version) and MIDP 2.0 Java application. The gadget has got 3.0 "display screen supportive of 256K colors. This handset device can display the images or videos with the resolution size of 240 * 400 pixels. call details (missed, dialed and received calls) respectively. The gadget has got a Qualcomm MSM 7210A 528 MHz Processor The handset is loaded with the standard Li-ion 1500 mAh battery, which is capable of producing standby time of 450 hours and talk time of 380 minutes.
The last PDA handset supports four band GSM and tri band 3G HSDPA networks. The gadget will be available in the market from March, 2010 onwards. The handset is equipped with 4 inches screen supportive of touch sensitivity, 65K colors and 480 * 854 pixels display resolution. The screen also includes accelerometer sensor for auto rotating the screen and Timescape / Mediascape UI on the screen. The handset has got Android 1.6 operating system, PDF cum documents reader, WMV media player, GPS receiver with A-GPS support etc.
PDA mobile phones are gaining popularity worldwide due to its similarity with computers in many respects. Mobile manufacturers in fact, keeping in view of the changing tastes of the customers are presenting more well designed, structured PDA gadgets every year. The owner of a PDA gadget can easily perform many computer based works like browsing flash based websites, viewing word documents, excel sheets, pdf files, powerpoint slides etc. on his / her handset.