Are you deciding to grab a iPhone, HTC Touch Diamond or Samsung i900? Here is a Samsung SGH-i900 video on its application and user interface

Samsung (i900) Specifications

* Network: HSDPA (7.2 Mbps), EDGE / GPRS 850/900/1800/1900
* OS: Microsoft Windows Mobile 6.1 Professional
* Display: 3.2″ WQVGA TFT LCD (240 x 400)
* Camera: 5 Megapixel CMOS
* Auto Focus, Image Stablizer, Geo-tagging, Auto-Panorama Shot,
* Wide Dynamic Range (WDR), Face Detection, Smile Detection
* Video: DivX / XviD / H.263 / H.264 / WMV / MP4
* Video Editing: Trim video, Audio dubbing, Live dubbing, Add subtitle, Image capture
* FM Radio with RDS
* MP3/ AAC / AAC+ / WMA / OGG / AMR
* GPS
* TouchWiz UI
* MS Office Document Viewer, Advanced PIM Apps, Push Email,
* Auto Rotation, TV Out
* Bluetooth 2.0 / USB 2.0 / Wi-Fi
* 8GB / 16GB Flash + External Memory slot : microSDHC
* Size: 112 x 56.9 x 12.5 mm
* Battery: 1440 mAh