OK thanks. Do I have to manually disconnect the bluetooth link to the android phone, or is moving out of range enough (or will it vary by manufacturer)? Is it just that those other BLE adapter IDs are not yet in the Android version, or that the implementation is harder/easier for some adapters than others?
Some OBDII adapter manufacturers choose to support BLE only when connected to iOS. When they connect to Android they switch back to the non-BLE protocol.
This makes sense because iOS does not support non-BLE Bluetooth unless it has a special chip in it approved by Apple. For Android almost all apps are expecting non-BLE. Only apps that know about BLE can use BLE.
A BLE only adapter has more limited use for Android devices since it needs a matching app that supports BLE.
The manufacturer of the dual mode Adapter (BLE:iOS, non-BLE:Android) wants to keep their Android market and expand into iOS with BLE.