It is the first time paperless tickets have been used at an event of this size in the UK.
O2 UK head of sponsorship Paul Samuels said: "It shows music fans are embracing mobile as a means to enhance their festival experience."
Mobi-tickets save festivalgoers money on booking and delivery fees. A barcode is sent to a user´s phone and then scanned on entry.
Samuels added: "Whether it´s streaming live audio clips to their handset delivering paperless tickets to their mobile or immersing customers in music O2 is placing music in the hands of its customers where it belongs."
Bluetooth posters have been set up across the festival site offering free music downloads to O2 customers. Users will also be able to text WIRELESS to 60600 to receive backstage gossip from the festival by SMS and MMS.
See Analysis page 12

Higginson is considering taking legal action.
He was asked to leave the group with immediate effect in an e-mail on June 11 though he remains Monstermob´s biggest single shareholder with a 16 per cent stake.
Higginson said: "I am disappointed at the way I have been removed by the board. I am presently taking legal advice."
Monstermob managing director Niccolo de Masi takes over as CEO.
Monstermob has operations in 26 countries. Its acquisition strategy is based on the principle that mobile will be the way customers access digital content in developing markets where there is limited access to broadband Internet.
Monstermob chairman Hans Snook said: "The great bulk of Monstermob´s business and potential now lies far from the UK and this is likely to become even more true. The board changes reflect this and best meet the needs of the group for the future.
"Martin had the vision to identify and establish a significant business opportunity and we wish him very well in all his future ventures."

Cottesloe School in Wing is encouraging its pupils to text for help when they get stuck on their studies. Deputy head David Stevinson thought up the Text Mentoring´ system and then approached O2 for technical and financial support to implement the pilot scheme.
"We´re always excited when our customers come up with innovative ways to use mobile technology to help their community" said O2 general manager for business sales Ben Dowd.
O2 helped Stevinson develop a web site to receive text messages and keep a record of answers for other students to refer to.
Initial trials with the school´s science department showed students given text mentoring improved their test results by up to 55 per cent.
Stevinson added: "I know many schools don´t approve of mobile phones in the classroom but that shouldn´t stop us from exploring ways to use them."

"People used to buy a mobile based on its function and style but colour is becoming more important than ever for making an individual statement" said Orange UK devices director Matthew Kirk.
To this end fashion designer Andrew Groves has been recruited as a spokesman for the network. He said: "Bringing colour choice to fashion mobile has become an important style statement and one that just like your wardrobe can be changed for the seasons."
Kirk added: "Two or three years ago you would never have seen a white or purple phone. By the end of the year we hope at least 25 per cent of our range will feature red pink blue and other combinations."
The violet Motorola is available from Orange stores now and the white Nokia 6233 from the beginning of July. Both are free with a £25 Orange contract.

SeeMeTV design company Yospace has held talks with each of the major UK networks and is understood to be on the verge of launching a SeeMeTV-style service with O2.
3 claims that SeeMeTV has proved popular with users since its launch in October with between one and two million downloads a month across Europe.
3 customers can submit a video clip to the site and visitors can browse and download the videos to their handset at a cost of 10p per clip.
The service credits the user who submitted the clip with 1p for every download. Over £100000 has been earned by users since the launch claimed Yospace.
Both Yospace and O2 refused to comment on the deal.

The group will fetch up to £1.1 billion from a consortium of two venture capitalists Bain Capital and Doughty Hanson.
Under the terms of the proposed acquisition Bain Capital will take on the Caudwell Group´s retail estate including nearly 400 Phones 4U outlets and its SME retail arm 4U Business which is in the process of being stripped down and integrated into Phones 4U in order to stem heavy losses.
Doughty Hanson will acquire the Caudwell Group´s two distribution arms 20:20 Logistics and Dextra/4U which are being restructured and aligned under the guidance of 20:20 group managing director Mark Ryan.
Doughty Hanson is also expected to take on the Caudwell Group´s repair company MPRC and recruitment agent Cornerstone Resourcing.
All parties concerned declined to comment.

The reshuffle follows the exit of director of indirect sales Simon Ainslie who will replace Mat Wolontis as UK managing director at Nokia.
T-Mobile denied that the realignment is because it is shifting its focus towards direct sales.
"It has nothing to do with the position of the independent channel" said a spokesman.
Ballantyne joined T-Mobile in October 2003 and currently heads up T-Mobile´s direct sales channels including its retail estate telesales and online activities.
T-Mobile delivered an ultimatum to The Carphone Warehouse Phones 4U and The Link earlier this month to sign up to new terms and conditions which include a 20 per cent cut in commissions from July 1 confirmation that they will deal only in T-Mobile-approved stock and new targets on churn.
T-Mobile refused to comment on the initiative.
It is awaiting the response of the high street multiples due by July 1 and also rival networks.
It is also cutting back the 25 per cent discount on its 18- and 24-month Business 1 contracts.
See Sharp End page 18

It is understood Ainslie has agreed to join Nokia at the end of July. Wolontis who has held the position of managing director since February 2004 and been with Nokia for over 12 years will take a senior European role within Nokia.
Nokia and T-Mobile declined to comment on the move but speculation last week suggested that T-Mobile UK managing director Jim Hyde might look to the US to replace Ainslie.
Terry Hayes vice-president of indirect sales and operations at T-Mobiles US business and a former colleague of Hydes has been tipped as a possible replacement.
Former Orange UK sales director Stuart Henry counted himself out of the running but admitted he might return to the mobile phone industry. Henry has been on sabbatical for six weeks following a stint at experience company Red Letter Days. He has been tipped for a role at The Carphone Warehouse but refused to comment.

The Internet domain is intended to create web sites specifically for viewing over mobile handsets. To use the .mobi domain companies must satisfy the registrar that their site is compatible with as many handsets as possible. So far 4000 companies have registered .mobi sites.
Top brands include easyGroup Virgin Mobile all five terrestrial channels BSkyB EMI Marie Claire and M&S.
To prevent cybersquatters only trademarked companies can apply for a .mobi domain until August 21. After this the registration process will be open to a general landrush´.

The proposal is outlined in a letter to shareholders and is thought to have angered many key investors who have been disappointed with the company´s performance.
Vodafone refused to comment however and said full details would be published in the company´s annual report in mid-June.
See Business Watch page 16