T-Mobile and Yahoo! have announced a strategic partnership which will see the first graphical advertising appear on T-Mobiles mobile Internet service, webnwalk. The service, which was the first in the UK to offer consumers unlimited access to the Internet on a mobile phone,  is set to carry a variety of graphical ads exclusively sold and served by Yahoo!.
T-Mobile and Yahoo! will pool their resources to enable advertisers to offer consumers targeted graphical ads when using the webnwalk service. The companies intend to roll out the first mobile ads on webnwalk in the first half of 2008.
Mobile advertising is a key area of development for T-Mobile in 2008 and this partnership with Yahoo! shows our commitment to making this strategy succeed, says T-Mobile Director of Marketing, Phil Chapman. With conventional mobile marketing tools limiting the levels of interaction, banner advertising through the Internet on your mobile creates many opportunities for potential advertisers to adopt innovative marketing campaigns. We regard Yahoo! as a leader in display advertising, and with its deep understanding of the mobile space and the potential that mobile advertising can offer clients, were glad they are on board as our partners. 
Geraldine Wilson, VP of Connected Life at Yahoo! Europe adds:
This partnership with T-Mobile demonstrates Yahoo!s continued focus on mobile and extending our leadership in graphical advertising across multiple platforms. Advertisers are fast recognising the value of mobile advertising as a core part of their digital campaigns, and we are excited to work with T-Mobile to create superior experiences that deliver great value to advertisers and mobile users alike.
T-Mobile notes that webnwalk enables users access to the real Internet. The network offers a number of price plans for contract and pay-as-you-go customers, ranging from 50p per day with the 5-day pass, to 7.50 per month for unlimited web browsing.   
Yahoo! Says that it is focused on creating the monetization engine for the mobile Internet, enabling publishers to monetize their services, and advertisers to reach their target audiences at large scale and with impact.