Hi Quinn, Thank you for your feedback. I have reviewed your suguested post. Unfortunately in our case, I cannot verify whether these failures were correlated with devices in China or were bought in China. From Firebase Crashlytics I can only confirm that these failures occur during networks call while the device is on Wi-Fi. Initially I suspected these failures were related to SSL pinning, but after reviewing the Apple's documentation and comparing it with our implementation, it appears to follow the recommended best practices. So at this point I still haven't identified it. Regards