The success of Huawei Technologies in becoming a global supplier of telecoms equipment was laid out for all to see at the Mobile World Congress in Barcelona last month.
Inside Huawei's huge marketing tent at the industry's main trade fair, computers showing maps of the world gave prospective customers the chance to see the spread of the Chinese company's clients across much of the globe.
But the maps also showed one country where Huawei has yet to make serious inroads: the US.
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