Samsung Electronics Co. and Sony Corp. reportedly plan to unveil new devices next month as two of Asia's biggest technology companies try to showcase their products before Apple Inc. releases new iPhones and iPads.

Samsung's Galaxy Gear, a wristwatchlike device with features of a smartphone, and Note 3 will be introduced Sept. 4, according to sources. Sony's latest Xperia handset, featuring imaging sensors used in its TVs and cameras, will be unveiled the same day, two other sources said.

Samsung and Sony are introducing their devices for the holiday shopping season as they try to steal the thunder from Apple, which has promised "several more game changers" in the product pipeline. Apple, which hasn't released a new handset this year, plans to introduce new versions of its iPhone and iPad at a Sept. 10 event, according to a separate source.