On December 1, 2025, ByteDance unveiled a technical preview of the Doubao Mobile Assistant. Leveraging the power of the Doubao large - scale model, this assistant was developed in close partnership with mobile phone manufacturers at the operating system level. At present, a select batch of engineering prototypes of the nubia M153, which come pre - installed with this assistant, have hit the market at a price of 3499 yuan, and they've already flown off the shelves. Users have multiple convenient ways to activate the assistant. They can use voice commands, press side buttons, or utilize headphones. Once activated, the assistant can seamlessly perform cross - application operations. For instance, it can compare prices across different platforms and place orders accordingly, edit photos with ease, play audio files, and even remotely unlock cars. Doubao has made it clear that, for the time being, it has no intentions of venturing into the mobile phone manufacturing business. Instead, it is actively forging ahead with cooperation with numerous mobile phone manufacturers to further enhance the assistant's capabilities and reach.