k770i

-current model
-95g
-screen size 1.9 inch, 320 x 240
-video support MPEG 4, 3GPP
-audio support AAC, AAC+, MP3
-3D games
-browser XHTML/ HTML (Netfront), RSS Reader
-pim application Alarm clock, Calculator, Calendar, Notes, Stopwatch, Tasks, Timer
-other app PictBridge
-digital zoom 3x
- extra feature Auto focus, Self Portrait, Self-timer

K800i !!

-obsolete
-screen size 2.0 inch, 240 x 320
-5 way Navigation Key
-1k phone book
-64mb internal
-video support 3GPP (H263, H264), MP4, Real8
-audio support MP4 (AAC, AAC+, E-AAC+), MP3, M4A, WMA, 3GP, AMR, WAV, G-MIDI 1, Real 8
Flight mode
-infrared
-RS-232, USB (Fast Port)
-EMS
-Instant msging
-browser xHTML/HTML (NetFront?3.3 browser)
-pim application Alarm Clock, Calculator, Calendar, Clock, Lunar Calendar, Stopwatch, Tasks, Timer
-max resolution 2048 x 1536 (secondary : VGA)
-digital zoom 16x
-extra features Auto focus, image and video stabilizer, Xenon flash, Auto red eye reduction, Landscape, Macro mode, Panaroma (1664 x 432), Self Portrait, Self timer, BestPic mode, Video Call (VGA)
-video Yes, video recording - 15 fts
-photo format JPEG(2048x1536,1632x1224,1280x960,640x480,160x120)
-video format 3GP (H263, H264)

that all that i can post about k800i advntge..so choose ur best

yup k800i got xenon flash n k770 not.. the advantage of k770 is not use joystick but the screen is
more small compare to k800i... i think better go for k800i...
this are the feature of both phone..
http://www.gsmarena.com/compare.php3?idPho...5&idPhone1=2052