Mar 25, 2021
Thanks for posting and welcome to the Community!
The part numbers for components can vary depending on which version of the A20 you have, and which country/region you are in so the best way to find the correct part number for your headset is to reach out to your local support team! You can find the contact information for your local support team at this link, by selecting your country/region and then the 'Contact Us' option at the bottom of the page.
I hope this helps!
Mar 12, 2020
Can you let the forum know what you want to achieve, or details of the problem and maybe we can help or recommend any other actions that may suit you?
All the best,