The US government's new mobile app for migrants to apply for asylum at the US-Mexico border is blocking many Black people from being able to file their claims because of facial recognition bias in the tech, immigration advocates say. The app, CBP One, is failing to register many people with darker skin tones, effectively barring them from their right to request entry into the US. People who have made their way to the south-west border from Haiti and African countries, in particular, are falling victim to apparent algorithm bias in the technology that the app relies on. The government announced in early January that the new CBP One mobile app would be the only way migrants arriving at the border can apply for asylum and exemption from Title 42 restrictions. Racial bias in face recognition technology has long been a problem. Increasingly used by law enforcement and government agencies to fill databases with biometric information including fingerprints and iris scans, a 2020 report by Harvard University called it the "least accurate" identifier, especially among darker-skinned women with whom the error rate is higher than 30%. Emmanuella Camille, a staff attorney with the Haitian Bridge Alliance ... said the CBP One app has helped "lighter-skin toned people from other nations" obtain their asylum appointments "but not Haitians" and other Black applicants. Besides the face recognition technology not registering them ... many asylum seekers have outdated cellphones " if they have cellphones at all " that don't support the CBP One app.