Where can I download mp4 movies on my android phone?

I assume you want to purchase them because there's nothing free in this world but anyways I suggest you try the Android Market if you wanna download it to your phone

You can torrent them - but this will require that you install torrent client software like uTorrent (and installing software always raises the danger of infection). You will then have to go to torrent sites to download the torrent files themselves - and those sites should not be visited by the unwary because they've got pop-ups and stuff, and they're always trying to get you to download stuff having nothing to If the movie is new enough, be prepared for - bad copies (like those having "cam" or "ts" in their names - those were shot using cameras pointed at the screen - fake files - in case you're downloading "WreckIt Ralph" for the kids, make sure to check it first to make sure it's not bad french porn - no anonymity. You can be tracked by your use of of both torrents and peer-share technology. This can lead to a costly civil suit (there are lawyers who do this en masse), or something minimal like throttling by your ISP.