I am on latest android 10 stable. I want to downgrade to Version WW-16.0631.1908.21 which was released all the way in October 2019. Trying to test a cure to delay in audio while using video recording. I have a way to treat it but it'll need me to go to this FW.
Now the problem is it is I have downloaded the Firmware but it is strange. I am attaching an image.
Please help me in how to downgrade. I can use ADB or anything. Just help me so that I can discover a way to treat delay.