Ma moze se spojiti i s verzijom 3.8 i sa 4.0. Spajao sam se bez problema, samo što povezivanje preko bluetootha strašno brzo potroši bateriju. Sada trenutno nemam to podešeno jer sam preinstalirao komp.
Uglavnom najbitnije je dobro instalirati bluetooth na kompu, odnosno emulatore serial porta kojima se dodjeljuje broj com porta. Nakon toga se taj port odabere na ActiveSyncu.
Uglavnom na mobu ne treba ništa podešavati, niti aktivirati portove. To se sve samo napravi kod konekcije. Inače ja sam se spajao s ROM verzijom 1.150 (znači starijom) bez problema.
Ajoj, gore sam dao postupak iz helpa, a u biti sam mislio na ovo što slijedi. Po ovome sam ja radio:

Before you start remove all the pairing on your phone and computer.
1. install Active sync
2. connect phone to USB cable and computer and let active Sync run once.
3. Disconect USB cable.
4. On your Computers Bluetooth software (add a com port) before you detect the phone (very important)
5. On Active Sync on Computer click "connection Settings" and make sure it is using your com port from step 4
6. turn on discovery on your computer.
7. On your Phone goto Bluetooth / devices / New and select your computer enter pin on phone and PC
8. Go to Active Sync on your phone and click "Connect via Bluetooth"

Note:
- the com port must be added before you discover the computer from you phone.
- you have to sync from the phone.... sync from the computer does not work.
- under advanced options in active sync on the phone.. you do not need to set it to bluetooth.. it can stay on usb.