Playing Music, In terms of music playback are two main formats, those used by the iphones and MP3 for everyone else. In my personal opinion, I prefer MP3 files for compatibility posed to be the industry standard format, although there are format converters, you lose some sound quality and lots of time when significant amounts of information. It is important to analyze whether the team has playing options as appropriate to our needs are: EQ, playlists, sorting by folders, audio books, as well as fidelity audio. Taking photos: This point is simple, the more mega pixels a camera has, the better its definition except in the case of digital cameras that use interpolation. A pixel is the smallest unit in which decomposes an image (one point), a mega pixel equals one million pixels, therefore the number of pixels in an image, is related to the quality and level of distortion in mind when making an enlargement (pixelation), so if someone is going to enlarge an image to print a poster or publish a magazine, you will need to take pictures with a megapixel camera over someone who is going to print photos picture frame size, or that will send email, but for a camera with digital interpolation (such as low-cost cell phone with many mega pixels and a small lens) they do is simulate a more great to actually take, by a computer program that fills the empty pixels (holes in the image) with the colors that are appropriate to the surrounding pixels, thus making a picture, enlarges and fills in the blanks to make it look like an image of higher resolution (more mega pixels), the results are generally good, but not as a real-resolution camera.