http://www.google.com/products?q=iPhone - To Purchase Online use Apple or AT&T websites - Recommend 3GS
We recommend at minimum that our Ayurveda students purchase the 3GS 32GB iPhone, which holds up to 40 hours of Ayurveda .MP4 videos. (Video capacity is based on H.264 1.5-Mbps video at 640-by-480 resolution combined with 128-Kbps audio; actual capacity varies by content. Source: http://support.apple.com/specs/#ipodtouch, http://www.apple.com/iphone/specs.html)
According to Apple: http://www.apple.com/iphone/buy: “Requires new two-year AT&T wireless service contract, sold separately to qualified customers; credit check required; must be 18 or older. Existing AT&T customers who want to upgrade from another phone or replace an iPhone 3G should check with AT&T or use http://www.apple.com/iphone/buy to find out if they are eligible for early upgrade pricing: $299 (8GB), $399 (16GB), or $499 (32GB) with a new two-year contract. For those who are not eligible for an early upgrade or who wish to buy iPhone as a gift, the prices are $499 (8GB), $599 (16GB), or $699 (32GB).
To this end, all of our Ayurveda instructional videos are available in the highly bandwidth efficient open standard Apple compatible .MP4 H.264 video format. These video files are half the size the traditional higher resolution .MPG MPEG2 files. Do do this you must use Apple iTunes and Quicktime (http://www.apple.com/itunes/download).
Be sure you have downloaded and installed the VLC Media Player for MP3-WMA audio and for MPG-FLV-WMV videos. It is the simplest and best Multimedia Player and should be used instead of Windows Media Player.
If you want to listen to the Ayurveda audios and videos using your iPhone - iPod - iPad you must use Apple iTunes and Quicktime (http://www.apple.com/itunes/download). In this case, for iTunes users, you should download the video files that have the .MP4 filename extension (H.264 - 640×480 resolution, 1008kbps, 25fps files) and the audio files that have the .AAC filename extension rather than the .MP3 or .WMA extension.