UCLA RoMeLa’s PhoneBot Reported as Bipedal Robot Controlled by Older Smartphone

On November 1, 2026, leaderobot.com reported on PhoneBot, a bipedal robot developed by the RoMeLa lab at the University of California, Los Angeles (UCLA). According to the article, the robot is 48.3 centimeters tall, weighs 1.8 kilograms and has 13 joints; hardware costs $400, excluding the smartphone. It uses a Honor 9, released in 2017, for control, sending movement commands over Wi-Fi to a single-board computer inside the robot.

If leaderobot.com’s report is accurate, PhoneBot separates the smartphone from the robot body and sends movement commands over Wi-Fi. The hardware is said to cost $400, excluding the smartphone, but the total cost including the phone and external laptop, as well as operating conditions in environments with unstable communications, require separate verification.

The reported design feature at the heart of PhoneBot is that the smartphone is not integrated into the robot but is placed outside it as the computing device for perception and decision-making. The report says there is no wired electrical connection between the smartphone and the robot, and that movement commands are sent over Wi-Fi. This presents an alternative to designs that fix control computing in the robot, but the article alone does not make it possible to assess under what conditions control over a communications link can support bipedal walking. The claim that even an older smartphone can be used should also be treated as a reported implementation example, not proof that the approach works across the board. Our related article, [NVIDIA expands Isaac]( /news/nvidia-isaac-wo-kakuchou-isaac-lab-3-0-ya-human-1m-dataset-w-380b9a), covered a development platform for humanoids and physical AI. In contrast, the PhoneBot report focuses on a robot design that uses an existing smartphone for control computing. Development platforms and a robot’s computing hardware are separate layers and should not be treated as the same technology. The reported design alone also does not establish how much using a smartphone simplifies development or updates. In terms of cost, the reported $400 is for hardware excluding the smartphone; it does not indicate the total cost including the phone or the cost of production at scale. The article also says an external laptop is used for functions such as conversations powered by large language models and speech transcription. Thus, the described setup does not run all functions solely on the smartphone mounted on the robot, but instead divides processing between the phone and an external computer. That division is a point to consider, along with additional equipment and connectivity, when evaluating the cost claims. From an operational perspective, it remains unclear how the robot handles communication delays or disconnections while walking, how consistently it can recover from falls, and how it performs when audio, vision and motion control run simultaneously. The article also mentions capabilities and load values, but the source here is secondary reporting, and no primary source is provided to independently verify the test conditions or methods. From the perspective of identifying failure modes before real-world deployment, as discussed in our related article, Laplace Intelligence presents red teaming for robots and self-driving cars, TechCrunch reports, a key question to investigate next is how PhoneBot’s developers evaluated communication failures and safety in the event of a fall.