- RC3: Kernel 3.1.10, 09.08C.00.0021/1123,
- RC4: Kernel 3.1.10, 0C.091.01.0021/1123
- RC5: Kernel 3.1.10, 0C.091.01.0021/1123
- RC6: Kernel 3.1.10, 0E.094.00.0021/1123
- RC6.1: Kernel 3.1.10, 0E.094.00.1123ada3s.20161007.221618
- RC7: Kernel 3.1.10, 0F.095.00.0021 or 0F.095.01.1123
Settings -> Device Info then check Kernel and Build.
A 2016 Jazz should have RC4 or RC5, depending from the assembly month.
RC between 3 and 6.1 can still install thirdy part android apps (working on 4.0.x android) thanks to a bug closed in RC7 and RC8.