UK mobile operator has launched a new unlimited data plan in its Pay-As-You-Go (PAYG) tariffs, allowing customers to consume as much mobile data as they wish for as little as £15 over a 30-day period.

The announcement will mean that Three PAYG customers will be able to download as many apps as they wish, surf mobile websites and update their status on social networks without having to worry about the cost.

Three hit the headlines when it announced availability of The One Plan, providing all-you-can-eat data for its contract customers for a £25 a month.

Existing customers who joined Three before September 2010 will have to migrate their tariff to Three’s new Pay As You Go options, signing up for the new All in One 15 or 25 add-ons.

Three offers the two plans; All in One 15 provides 30-day access to unlimited data with 300 any-network minutes and 3000 texts. All in One 25 costs £25 and offers 500 minutes, 3,000 texts and 30-day access to unlimited data.

Three’s Sales and Marketing Director, Marc Allera, said:

“We want to get people using their smartphones in the way they were designed to be used, and that means data.

More importantly, we want people to feel comfortable doing this without worrying about the cost. That’s why the new offers include all-you-can-eat data along with a huge allowance of minutes and texts.

Three’s network was built for data, and it’s the confidence in the strength of our 3G network that means we can introduce deals like this.”