30Apr2019 Huawei backdoor categories: Cybersecurity, information technology https://www.neweurope.eu/article/vodafone-discovers-hidden-backdoors-in-italys-huawei-infrastructure/ https://www.bloomberg.com/news/articles/2019-04-30/vodafone-found-hidden-backdoors-in-huawei-equipment https://www.bbc.com/news/business-48103430 Vodafone found security flaws in Huawei equipment in 2011