Best Practice: Select a small mix of high-end and low-end iOS and Android devices, including smartphones and tablets. Add the latest Google Pixel model to test Android beta versions.
iOS:
iPhone 12 (iOS 15.x)
iPhone X/XS/11 (iOS 14.x)
iPhone 6(S)/7(S)/8 (iOS 13.x)
iPad (latest with iOS 15.x)
Android:
Samsung Galaxy S20/21 (Android 12)
Samsung Galaxy A50/51/52 (Android 11)
Samsung Galaxy A40/41/42 (Android 10)
Samsung Galaxy A11/12/13 (Android 9)
Samsung Galaxy Tab A8 (latest with latest supported Android on it)
Huawei (any model with latest with latest supported Android on it)
Xiaomi (any model with latest with latest supported Android on it)
Android Beta Versions:
Google Pixel 5/6 (exclusively for Beta versions)