Mobile phone features
GPS
Tells your your current location, this can give you the distance from your current location to a place you want to go. EG; to the train station.
NFC
near field communication; this allows people to have card less transaction, Barclay's barcode the goes on the back of your phone.
Screen Size
on a computer monitor, the viewable image size or VIS is the actual amount of screen space that is available to display a picture. The bigger the screen size the more it drains your battery
Bluetooth
Bluetooth is a wireless technology standard for exchanging data over short distances EG; pictures
WIFI
Wi-Fi is a popular technology that allows an electronic device to exchange data wirelessly (using radio waves) over a computer network,
BAND
You can have a single, dual, tri, or quad band. Each country has a band, and can only use it in the county thats got 'your band' if you have quad band you can use it everywhere you go. This would be useful
External Storage
You can back up your device, or give it to someone, to share photo's and files