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You could buy the Samsung galaxy S3 which is a very good phone it also fits the £500 pound budget as it is only £429.95 this would help your company with the deliveries for a number of reasons some of them being it has a satnav  in the phone in case your lost and cant find your destination also it will help you get there quicker, it also has  a tracking device in the phone in case you want to look where the worker is these are 3 very good reasons why this phone would help your company 

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Infrared light is a type of electromagnetic radiation. Its 

wavelength is longer than that of visible light, making it invisible to the naked eye unless special equipment and filters are used. Infrared Cameras

3G is the third generation of wireless technologies. Is is used so you can access the internet wherever you are and you do not need to be connected to WI-FI

Bluetooth is used so you can play you music out load on your phone and you can also use headphones and play your music wireless it also means you can send other people videos pictures and music through Bluetooth

SMS : Short message (or messaging) service, a system that enables cellular phone users to send and receive text messages.

GPRS: satellite signals if can help you find where you are and can give advise how to get to your destination like a sat nav 

   Protocols

 

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