Sony Ericsson Xperia arc S - Specifications

This is the space available within your phone to store things like photos and music tracks without using a memory card.

Wi-Fi lets you to connect your phone to a wireless network - at home, or in a public Wi-Fi hotspot (like those available in many coffee shops). While you're using Wi-Fi, you're not using any of your UK data allowance.

Using your phone as a modem means you can connect it to a laptop or netbook and use it to provide internet access to these devices. You can do this wherever there's a mobile signal. It's also known commonly as tethering.

This button switches on your phone's camera with a single press - so you can start taking photos quickly.

This lets you take a photograph of yourself (or join a group photo) by delaying the time between pressing the button and when the actual picture is taken.

Call people you speak to most by holding down just one button on the phone's keypad. Most phones with this feature let you assign contacts to numbers 2-9.

Tells you if someone's calling you while you're already on the phone to someone else. You can hold one caller and speak to the other without disconnecting either of them.

Lets you enjoy your music on your phone without using headphones. It's also handy if several people need to hear whoever's calling. Not suitable for use when driving - you'll need a hands-free kit for that.

This helps you text quicker by suggesting words and completing words for you. It can normally be turned on and off.

This lets you enjoy the internet on your phone. Most sites can be accessed using a phone that has this capability.