"We are pleased with the outcome of the case," a SingTel spokeswoman said in an e-mail statement.

Details of the court ruling were not immediately available. However, Singapore's Straits Times newspaper that in addition to upholding SingTel's trademark, the court ordered Mitac to pay SingTel's legal fees.

Mitac, which registered the Mio trademark in Singapore in 2003, could not immediately be reached for comment.

Mio is the brand name Mitac uses for its line of GPS-equipped smartphones and navigation units. The company rolled out its first Mio product in 2002, and applied for a Singapore trademark for Mio in 2003. That trademark was granted in 2004, according to the (IPOS).

Two years later, SingTel applied for a Mio trademark to use with a service that includes mobile Internet, broadband Internet access, landline phone access, and pay TV.