How do I run DeX on my phone?

Excuse me, could you please clarify how one might go about running a decentralized exchange, also known as DeX, on their mobile phone? I'm curious about the process and any specific requirements or steps that I should follow to ensure a smooth and secure experience. Would it involve downloading a specific application or using a particular wallet? Additionally, are there any potential security risks or limitations I should be aware of when operating a DeX on a mobile device? Your guidance would be greatly appreciated.