BlackBerry Z10 in Black (4G-ready) - Specifications

With some phones, you need a memory card to use certain apps. We sell a wide range of them, from 2 GB to 16 GB.

The size of your phone's processor affects how fast you can do things on it. For example, you'll be able to have more apps running at the same time on a phone with a 900MHz processor than with 500MHz.

Screen sizes are measured diagonally. The bigger the screen, the better the viewing will be when you're browsing the web or watching videos.

You can make calls, send texts and browse the internet on a 2G network. If you're looking for faster web browsing, you might want to look at 3G-enabled phones.

Bluetooth lets you transfer photos and music (and lots more) wirelessly from one phone to another. It also means you can connect your phone to a wireless bluetooth headset or car kit.

Wireless tethering means you can connect a computer or other internet-enabled device to the web through your phone's 3G internet connection.

A 3G network allows high-speed web access and advanced browsing.

4G network

Generally, the more megapixels your phone's camera has, the sharper the image will be.

Front-facing cameras are great for video calling (if your phone has the functionality), or seeing what you and your friends look like before you take a picture.

With auto-focus, you can click or tap to take a photo and your phone's camera will automatically focus on the subject.

The quality of the videos you record on your phone depends on the resolution and frames per second. VGA is lower than 720p (HD) and 1080p (full HD).

The operating system of your phone will come with its own application store - where you can download apps and games to your phone (some of them for free).

Transfer music and pictures from your PC or Mac straight to your phone.

BlackBerry Messenger (or BBM) is an instant messaging service for BlackBerry users. It lets you send real-time messages, share pictures and even show your friends what you're listening to.

Make a phone call without having to search through your phonebook. Voice-activated dialling means you can simply say the name of the person you want to call and the phone will dial their number automatically (you'll need to set this up first).

There are different types of email you can get on your phone. You can keep up-to-date with accounts like Gmail, Hotmail and Yahoo! - and with push email, you'll get your messages straight away.

Content Control stops customers under the age of 18 from accessing inappropriate content. This can be removed.