I tried doing 2 recently, found the file with CertificatePinning in the name, found the part returning 1 and 0 based on whether the check passed and patched it to return 1 in both cases. It still didn't work and after a few hours, I gave up, grepped through the decompiled files for the website name, got an endpoint which turned out to work perfectly in a web browser and which led me to the ultimate endpoint I needed.

I could probably have gone deeper and found more functions to patch, but I don't know smali so everything was guessing and matching up to the java decompiled source (and the original source which seems to have been Moxie's?)

(>$100 billion company making the app with >1 million users.)