I spent some time with OpenGUI recently, running a long-haul task on a real phone: open X, search for recent discussions on mobile AI agents, collect the main viewpoints, and summarize what people care about. The task is one sentence in plain English. The execution breaks into dozens of judgments and actions. Is the app open? Are we on the home screen? Did the tap hit the search box? Is the result page loaded? Did a login popup appear? A recommended-follow modal? Did the page navigate away, and should we go back or retry? Traditional mobile automation struggles with this kind of task. Not because tapping is hard, but because real phones don't follow scripts . To test this, I ran the same task three times with three different setups. Pure script (Appium) : Failed all three times. Once stuck on an update dialog, twice the search results page changed its xpath. Average survival: 4 steps. VLM screenshot loop (v2 Agent) : One success out of three, taking 18 minutes.…