iPhone Development with Bluetooth SPP OS 3/4

I am in the process of developing an iPhone application that communicates with a number of Bluetooth devices that all support Serial Port Profile - well I 开发者_如何学运维assume that it is SPP as they show on my MacBook as Serial Port DevB etc.

I understand that iPhone OS 3.x does not support SPP - is that correct? Does anyone know if that has been "fixed" in OS 4? I've seen reports of OS 4 supporting keyboards, but is that a locked version of HID, or will SPP be available via the SDK?

Kind Regards, Nige.

It appears to be a locked version of HID, you can track Bluetooth support here: http://support.apple.com/kb/HT3647