Sony Corp. and Line Corp., Japan's most popular messaging service, are considering joining forces to develop devices powered by artificial intelligence. The companies are exploring opportunities around digital personal assistant technology to co-create a new communication experience, Sony said in a statement at the Mobile World Congress in Barcelona, Spain, on Monday. Sony unveiled concept earphones powered by Xperia Agent, a virtual butler that responds to voice commands and head gestures. While Sony's Xperia smartphones are an also-ran in a market dominated by Apple Inc. and Samsung Electronics Co., Chief Executive Officer Kazuo Hirai has resisted pressure to shutter the mobile business. He argues it will serve as a springboard into the nascent market for wearable and interconnected devices known as the Internet of Things.