How to check the activation date of your mobile phone on Huawei: Open Settings, click About Phone, enter the electronic three-guarantee voucher, and finally find the activation date. Huawei mobile phones belong to Huawei's consumer business. As one of Huawei's three core businesses, Huawei's consumer business began at the end of 2003. After more than ten years of development, 16 R&D centers have been established in China, Russia, Germany, Sweden, India and the United States. In 2015, Huawei was selected into the BrandZ Top 100 Most Valuable Brands, ranking 16th among brands in the technology field. On July 31, 2018, preliminary data released by International Data Corporation, a Chinese market analysis organization, showed that in the second quarter of 2018, Huawei's shipments exceeded IPHONE and ranked second in the world.