Two known issues that I have noticed
1. BT Headset (I use iTech that has FM feature, while connecting/call it has very loud hissing noise [it is literally unusable to talk over the headset).
2. The predictive text on the soft keyboard (not displayed by default). I manage to do some tweak on the registry and it appears BUT the keyboard hardware now can only input digits for all the 0-9 keypads. (no win-win situation yet)
Inviting all owners of these devices to list down the problems & the possible resolution to it.
I have attached the cab to enable the predictive text on soft keypad, you can always uninstall it if it doesn't suit your needs. I use more on soft keypad so I can go without the hardware button works perfectly.