Hutchison 3G UK is to launch a range of new tariffs aimed at customers who use mobile data more than they use voice and SMS services.

The company said that the new tariffs have been driven by the massive increase in mobile data usage over the last 18 months, and insight from customers that they want to keep better control of their costs. They ensure that smartphone customers can enjoy all the benefits of internet on the move, without fear of data bill shock.

For customers wanting plenty of everything, The One Plan - the original all-you-can-eat data plan - continues to offer unlimited mobile data. Alongside it, Three now introduces two new tariff families, with data firmly at their heart.

The new Ultimate Internet plans start from £18, offering all-you-can-eat data for customers. While for those more occasional users wanting to discover the mobile internet, the Essential Internet plans include a 250MB allowance that will cut off once the limit has been reached to avoid additional mobile data charges.

Essential Internet customers who decide they want more data during the month can either buy a 250MB add-on for £2 or an all-you-can-eat add-on for £5, each of which lasts for 30 days.

Thomas Malleschitz, marketing director at Three says: "These new plans see the end of out-of-bundle data charges. Three is built for the mobile internet, it's at the heart of everything we do and that's reflected in these new plans. Mobile internet usage is continuing to increase at lightning speed, customers are beginning to prioritise data and they rightfully expect their network to allow them to do so without hitting them with extra charges.