The handset giant, which began shifting its global account out of WPP's Ogilvy & Mather earlier this year, is to use AMV BBDO as its lead UK agency, having already worked with the BBDO network on a project basis.
Although recent campaigns have originated from the US, it is understood that AMV will develop local advertising for new and existing models and that it is already working on a campaign that will air in the new year for Motorola's SLVR handset.
Motorola appointed Dutch agency 180 Amsterdam earlier this year to work on the launch of the PEBL handset and will continue to work with the agency on projects.
Last month, the firm was hit by the death of chief marketer Geoffrey Frost, who had worked for Motorola for six years. George Neill, corporate vice-president of marketing, is leading the firm's global marketing on an interim basis.
The company has enjoyed bumper sales this year due to the popularity of its RAZR handset. It is the second-biggest handset manufacturer in the world and has a global market share of 19%.
According to Strategy Analytics, Motorola sold 33.9m phones in the second quarter of 2005 globally, compared with Nokia's total of 60.8m.