From: http://www.internettablettalk.com/blog/?p=209 Ok, I think pairing the 770 with an N-series phone is great. I like how the 770 supports RS-MMC and DV-RS-MMC cards. I managed to play with the N90, took 2MP pics and catured videos with sound, saving them directly to the DV-RS-MMC. I then popped out the card from the N90 and inserted it to the 770. I ran image viewer (Images), opened the image folder in the card and displayed the images. It worked beautifully! I then ran Video player, opened the Video folder, and nothing. It can't see the any video files. I then ran File Manager to check if the video files were indeed on the Video folder. I saw several .mp4 files but no application was associated to the .mp4 extension. I then thought of changing the extension of one file to .avi. Surely enough, the icon changes to a video clip icon -- but the main question was, will the Video player recognize the format? Double tapping the file brings up Video player, and after a second or two, plays the video. Awesome! The Nokia 770 specs say that it can supports MPEG1, MPEG4, Real Video, H.263, AVI, and 3GP. Why only support .avi extensions then? Was this overlooked? Anyw orkaround to associate .mp4 with the Video player app?