I am just guessing, but I think the problem is that the BluetoothManager.framework
is made for the External Accessory Program by Apple. And this allows (among others) SPP Bluetooth connection to certificated devices. But there is the problem: you need to have a device with a authentication chip inside.
I don't know on which level/layer Apple implemented the authentication, but I fear the did it one layer under the private framework BeeTee is using.
UPDATE: Maybe this is helpful for you:
BluetoothManager *bluetoothManager = //...
[bluetoothManager setDevicePairingEnabled:YES];
[bluetoothManager connectDevice:bluetoothDevice withServices:0x00002000];