After i looked at how mobile phones worked, i then moved on to the different companies that provide mobile telecommunication services. I had to list all the networks that are available in the UK. After i completed this task i then moved on to list all the mobile manufactures in the world. I also looked at where you can buy a mobile phone from.

Mobile Networks

• Virgin Mobile
• Tesco Mobile
• Blyk
• Vectone Mobile
• LycaMobile
• Talkmobile (The Carphone Warehouse)
• BT Mobile
• ASDA Mobile
• abica
• Lebara
• Giff
• Family Mobile (IKEA)

 

All the mobile phone manufactures

Acer Inc. Alcatel Mobile Phones Apple Inc. Audiovox BenQ BenQ-Siemens BYD Electronic CECT Cherry Mobile Cyon Danger (company) DBTel Dell Ericsson Evertek Firefly (mobile phone) G'Five Twig Com Ltd. Goldvish Gradiente Hewlett-Packard HTC Huawei INQ Inventec Jolla Just5 Karbonn Mobiles Kejian KT Tech EVER Kyoto Electronics Lanix Lenovo LG Electronics M.Mobile MagCom Micromax Mobile Mitsubishi Electric Mobiado Modu Motorola Motorola Mobility NEC NEC Casio Mobile Communications Neonode Nexian Ningbo Bird Nokia Onida Electronics Qi hardware Palm, Inc. Panasonic Pantech Pantech Wireless Peiker Acustic Philips Research In Motion Samsung Telecommunications Sanyo Sendo Sharp Corporation Siemens Sonim Technologies Sony Mobile Communications Spectronic Technophone Thuraya Vertu Videocon VK Mobile Xiaomi Tech Zonda Telecom

 

list of mobile maufactures was taken from http://en.wikipedia.org/wiki/Category:Mobile_phone_manufacturers 

Shops that sell phones

 

Phones 4 U

Vodaphone

O₂

Virgin Media

Carphone Warehouse

 

All these shops will sell you a phone that will be locked to a network for example they might sell you an iPhone 4s but it will be locked to the O₂ network