  Recent advancements in large language models (LLMs) have led to the creation
of intelligent agents capable of performing complex tasks. This paper
introduces a novel LLM-based multimodal agent framework designed to operate
smartphone applications. Our framework enables the agent to operate smartphone
applications through a simplified action space, mimicking human-like
interactions such as tapping and swiping. This novel approach bypasses the need
for system back-end access, thereby broadening its applicability across diverse
apps. Central to our agent's functionality is its innovative learning method.
The agent learns to navigate and use new apps either through autonomous
exploration or by observing human demonstrations. This process generates a
knowledge base that the agent refers to for executing complex tasks across
different applications. To demonstrate the practicality of our agent, we
conducted extensive testing over 50 tasks in 10 different applications,
including social media, email, maps, shopping, and sophisticated image editing
tools. The results affirm our agent's proficiency in handling a diverse array
of high-level tasks.
