Consumer group Which? has brought the claim on behalf of around 29 million phone users.
Which? alleges Qualcomm breached UK competition law by taking advantage of its dominance in the patent-licensing and chipset markets.
It claims this resulted in Qualcomm being able to charge manufacturers such as Apple and Samsung inflated fees for technology licences, which have then been passed on to consumers in the form of higher prices or lower-quality smartphones.
Sky News has approached Qualcomm for comment. The company has previously said the case has “no basis”.
The trial will run for five weeks from today at the Competition Appeal Tribunal in London.
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If Which?’s first trial is successful, there will be a second trial focusing on Qualcomm’s conduct and the damage suffered by the class, that Which? has calculated at around £480m.
Which? is seeking damages for all affected Apple and Samsung smartphones purchased between 1 October 2015 and 9 January 2024.
