How these phone systems work is that Huawei has access to them to send updates and can remote in. Same with American or European telecom manufactures. In case of a war or conflict the Chinese government can order Huawei to shut down systems they have installed in foreign countries anytime. So while it might be an economic objective to sell more Huawei systems there is a security angle to that for every Huawei phone system running that it can be shut down remotely or sent a bad update that shuts it down. Which would be magic if a country aligns with the United States against China in some sort of conflict even if that country never goes into battle it will still be punished by China in a way that will take millions of dollars and probably months to recover from.