Mobile broadband lets you connect your laptop to the internet wherever you go. As long as you can pick up a 3G signal, you'll get online...
Mobile network T-Mobile (www.T-Mobile.co.uk) offers a choice ofpay-as-you-go mobile broadband, pay monthly plans or even pay upfront packages.
As well as the usual USB dongles, T-Mobile also has a range of mobile Wi-Fi or "Mi-Fi" pointers to share your connection with any Wi-Fi enabled device - whether it's a laptop, tablet, smartphone or printer.
T-Mobile pay monthly plans come with 18-month contracts and generous download allowances of up to 10GB. There are also "unlimited" options to consider if you're a big downloader.
Its pay upfront dongles come pre-loaded 90 days of internet usage, and by paying upfront you can save up to 25% on T-Mobile data costs.
T-Mobile broadband benefits
One of the main benefits of T-Mobile's packages is the fact that a fair usage policy is used rather than strict download limits. Other providers charge as much as 20p per extra MB you use, but with T-Mobile you won't immediately be charged if you exceed the monthly allowance.
T-Mobile has also been found to be one of the UK's fastest mobile broadband providers.
T-Mobile broadband coverage
The top speed on T-Mobile's network is currently around 7Mb. However, speeds vary depending on where you live and, just as with a fixed line connection, you're unlikely to ever reach the top advertised speed.
Make sure you check coverage in your area on T-Mobile's website before signing up.
Our expert's verdict
Michael Phillips, managing director of broadbandchoices, said: "T-Mobile is regularly voted the UK's fastest mobile broadband provider. It is also the only supplier to offer a fair use policy instead of a set download allowance. This means that customers won't automatically be charged for exceeding their allowance.
"To add to this, T-Mobile offers a great range of mobile broadband packages, with options to suit occasional users as well as people who need it every day."
Use our price calculator to compare broadband deals available in your area.