The United States Department of Commerce has banned all American companies from selling components to Chinese phone manufacturer ZTE. This includes Qualcomm and Dolby, both of whom have made major contributions to previous ZTE phones. The loss of Qualcomm-made SoCs is sure to damage the salability of ZTE phones.
https://www.notebookcheck.net/Qualcomm-Dolby-and-others-banned-from-selling-components-to-ZTE-for-7-years.299328.0.html