Vodafone offers mobile phones and exclusive price plans direct, online. Optional extras include automatic line rental discounts, Stop The Clock (up to 60 minutes for the price of 3), text messaging bundles and their Family add-on, which offers unlimited calls and texts between four or more people if they're all on Vodafone.

Buy mobile phones direct from 3, whose online shop offers exclusive deals on contract mobile phones and 3G mobile broadband. Any discounts are applied directly to your bill, so you don't need to claim cashback. Their competitive price plans offer plenty of choice for combining minutes and/or texts as you wish.

Buy direct from T-Mobile for exclusive deals on their phones and price plans. They also offer low cost mobile web browsing via your phone or using a USB modem or PC datacard. Choose contract mobile phones with flexible inclusive call and texting allowances - or buy a pay monthly SIM card, keeping your current phone.

Visit O2's online shop to take advantage of special, online-only pay monthly price plans - plus other exclusive offers and extras that are only available when you buy your new mobile phone direct from O2. You can also buy Blackberry phones and handsets from O2's own-brand, Xda range.

Shop online for Orange mobile phones at the network operator's own online shop. Orange offers cover the full range of options, including a wide range of contract / pay monthly mobile phones plus pay monthly SIM only deals, where you keep your existing phone.

Vodafone's business mobile phone shop includes smart phones, PDAs and regular phones with a choice of flexible price plans. Their offers cater for individuals (eg sole traders, self-employed) up to small / medium sized businesses, who can share allowances between a number of users.

T-Mobile's business services include pooled voice, text, data and Wi-Fi hot spot allowances for multiple users and immediate replacement of faulty phones (no messing about with repairs). Handsets include BlackBerry mobile phones that support instant / push email.

O2's business shop caters to small businesses needing phones for between one and five users. Products include O2's Xda® range of PDAs and BlackBerry devices offering push email, voice calling and mobile web browsing. You can also buy 3G data solutions for mobile connectivity on your notebook PC.

One of the UK's largest independent mobile phone dealers, Phones4U offers contract and pay as you go mobile phones on all major networks. You can search their deals by manufacturer, network or current top sellers. Most major handset brands are represented, including the very latest models.

Part of the same group of companies behind high street brand Phones 4U, Mobiles 2 Your Door brings all their experience and knowledge to bear in an online mobile phone shop that offers both contract and pay as you go mobile phone offers. This easy to use site includes great clearance deals.

Specialising in contract mobile phones, The Phones Spot is part of the Carphone Warehouse group and sells a wide choice of handsets, including cheap clearance deals on many mobiles from Nokia, Samsung, Motorola and other brands. "Sherlock Phones" is on hand to help you find the right deal, step by step.

Buying a new mobile phone is easy at The Carphone Warehouse's online shop, which offers web-only specials and clearance deals on both pay monthly and pay as you go mobile phones. There's also a good choice of memory cards, Bluetooth headsets and other accessories for popular handsets. You can also buy the Apple iPhone online from The Carphone Warehouse, on O2.

Get cash for your old mobile phone from Envirofone, who'll take it off your hands in return for your choice of cash or credit at Argos. All the mobiles that they receive are either re-used in areas of need or recycled, so you get to feel good, too!

Buy SIM free Nokia mobile phones and accessories direct from Nokia's own online shop - backed by the reassurance of the big name manufacturer's own guarantee. You'll find all the latest Nokia models, with full details and specs.