HELSINKI (Reuters) - Mobile phone maker Nokia said on Tuesday it would launch its "Comes with Music" package with an offering in Britain, signing a deal with Carphone Warehouse to sell the first model.

A source familiar with the deal told Reuters the phone would go on sale next month.

The free music package is a cornerstone of the cellphone maker's push into the services business, but also sets a trend for other gadget makers, like Apple, to follow.

Nokia says its "Comes with Music" package will differ from other market offerings because it will allow users to keep all the music they have downloaded during the 12 months.

Universal, Sony BMG and Warner Music Group have signed deals with Nokia to offer their tracks on the service, bringing the world's three largest labels on board.

Meanwhile Carphone will get exclusive rights for unsubsidized Nokia 5310 XpressMusic "Comes with Music" edition sales in Britain, the Finnish company said in a statement.

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