Huawei hit the headlines as the GCSB banned it from Spark's 5G mobile network upgrade and its chief financial officer was arrested in Canada at US request.

Here's a Q&A on the Chinese giant.

What is Huawei?

Huawei is the world's largest maker of telecommunications infrastructure technology - or the hardware and software used to run mobile and landline networks. Sweden's Ericsson and Nokia Networks (created as a joint venture between Germany's Siemens and Finland's Nokia) provide its main competition in this market.

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Huawei is also the world's second-largest maker of smartphones with around 16 per cent market share, behind

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