Who should select a different build?
Users who are testing new builds may encounter a problem and may need to switch back to an old build.
When we make big updates normal users will have the old build available for some time.
When should testers select a different build?
Testers should select the NEW build if they want to test new features.
Testers should select the OLD build if the new build is not working as desired.
How to select a different build in TestFlight?
Open TestFlight App on the iPhone
Tap the SPINSIGHT App
Tap on “Previous Versions”
Select the version that you want to use from the list and install it
For more details on TestFlight go to https://testflight.apple.com/ and read section “Testing builds from previous versions and build groups”.