Note that there are no 20732S units in the mass market that are loaded with A1 firmware.
SDK 1.1 will only work with A0 firmware. If you cannot program using SDK 2.0, but SDK 1.1 works, it's A0 firmware.
Firmware revs are not identified within the part number for each device.
A 20732SA1 could technically exist, but it does not within the mass market. There are several customers out there with A1 20732 silicon, but it's not supported in the broadmarket.
Ok thanks for the clarification.