Nitro is understood to have been appointed on a project basis and is developing a series of short films for Nokia, which are expected to break later this year.
In June, it was reported that Nokia was talking to networks about its £175 million global advertising arrangements (Campaign, 1 June).
Grey London holds most of the Nokia account, working across three of Nokia's four divisions: mobile phones, enterprise solutions and networks. In May, the agency created a campaign to launch the 3250, Nokia's twisty music phone.
Interpublic agencies, including Lowe Worldwide, are also on the roster. they were appointed in January 2005 after a pitch against WPP, Omnicom and Havas.
IPG was appointed by Nokia's multimedia division to create advertising for Nokia's Nseries products. Nokia has signed off a major campaign, created by Lowe London, which will break globally in October.