What is correct version of ADS integration guide for Unity Ads for 2019.2.6 version?

Device Logs iOS: How To - Capturing Device Logs on iOS
Device Logs Android: How To - Capturing Device Logs on Android

Collecting Charles logs is much more complicated if you aren’t already familiar with the product (which is really cool once you get the hang of it, by the way). If you’re looking for a challenge, I’d recommend starting here Getting Started • Charles Web Debugging Proxy.

Thank you for your help with this!