The decision comes after Sony earlier shortlisted Saatchi & Saatchi and Bates141, without ruling 10AM out of the running.
The pitch kicked off with RFPs sent to these three agencies, along with TBWA, after Y&R resigned the business earlier this year (Media, 17 April).
Both agencies were selected based on their good track record, in-depth strategic analysis, creative strategies, as well as the strength of their working team for Sony, said a Sony spokesperson.