EU commissioner Neelie Kroes in an interview has warned that the iPhone and other phones may be pushed open by new European interoperability rules. Citing Apple as an example, she observed that the App Store and other closed platforms were examples of customer lock-in for proprietary technology. Kroes stopped short of proposing exact measures in a EurActiv talk but made clear Apple wouldn't be immune to an overall push for interoperability by the European Commission, whose Digital Agenda could make licensing and publishing formats a legal requirement.