The browser matters as much as the IP
We ran the same scenario on the same clean mobile IP with several browsers. A plain, unmodified browser sailed through where popular antidetect tools were flagged instantly. That told us something important: a clean IP is necessary but not sufficient. If the browser's fingerprint gives you away, no proxy can save it. This is good news in a way: it means the part we control (a real, dedicated French mobile IP) was never the weak link.
Why detection engines flag antidetect browsers
Modern detection doesn't ask whether a browser is rare; it asks whether it is consistent. A real device holds together: the graphics card matches how images render, the declared operating system matches the network signature, the reported hardware matches reality. Many antidetect browsers fake dozens of these values, and every faked value is a chance to contradict another. The detector hunts those contradictions. Counter-intuitively, hiding more can expose you more; the browsers that stay boring and coherent are the ones that pass.
The browser that passed our tests
Out of the antidetect browsers we evaluated, Dolphin Anty was the one that consistently read as a normal browser to the detection engine, and it went on to create and keep a live Vinted account in a real test, where others were flagged on sign-up. Its approach is to fake very little and stay coherent, which matches everything we observed. We pair it with a dedicated French mobile IP. One account is still one data point, so treat any tool as part of a careful setup, not a magic pass. But if you're choosing today, that's the one we'd start with.