One of the most popular features of the Apple iPhone is the ability to watch full movies on it.

Now, the screen is small, of course, compared to even a computer or laptop, never mind your flat panel at home, but the big advantage is you can watch these movies anywhere - while travelling on a plane or train (or the back seat of a car), while you're waiting in line at the bank, at work (but only in your rest breaks, of course), while relaxing in the park or at the beach (but watch out for that sand, as it gets everywhere).

And there is already a large number of iPhone movies that are available - and the list is growing all of the time.

Something else to consider is the fact that full-length movies tend to be very large - typically around 700MB or more.

So, what you need to do before you can watch your iPhone movie is to download the movie to your computer first, which usually will have a much faster Internet connection.

Once the movie has been downloaded to your computer, you can then transfer it to your iPhone using a cable.

The next question you're probably asking yourself is, where can you get movies for your iPhone?

You might be tempted to look for free movies on some of the bit torrent sites, but that's a really bad idea.

Whatever money you might save by getting the movie for free will be more than offset when you fall prey to some hacker who's spreading his virus all over the place. And you won't know your computer or iPhone's been infected until it's too late.

Apple is another place to download movies, but using their iTunes store on a regular basis will really rack up a big bill.

Your best bet, then, would be to sign up for a service such as MyPhone Express, where, once you've signed up and paid their one-time membership fee, your iPhone movies download allowance is unlimited.

Once you're a member, you can also download as much music as you want, as many ringtones, applications as you like, and much more, for free, with no limits, for as long as you like.

Not only that, but you'll be a lot safer, as you know you'll be getting your iPhone 3G movies from a trusted source, which means no viruses or other nasty surprises.