Fujitsu Ltd. and Mitsubishi Electric Corp. said Wednesday they are in talks over the joint development of mobile phones for NTT DoCoMo Inc.’s FOMA third-generation mobile phone service.

The two companies have no plans to set up a joint venture; any products jointly developed will be sold under their respective brand names, company officials said.

Mobile handsets will be based on the Symbian operating system, which is used for about 85 percent of mobile handsets sold worldwide, they said.

Other details of the collaboration remain subject to negotiation, the two companies said in a statement.

Mobile phone manufacturers are competing in the market for high-performance handsets, while trying to speed up development and slash development costs.

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