Android 4.2.2 is already available for the Samsung Galaxy Exhibit 4G but as you already know, Bluetooth does not work in it. Fortunately, there is another jelly bean ROM (Android 4.1.1) in which Bluetooth works as well.
The developer says everything works in it.
GSM (Both calls and data)
Bluetooth file transfer
USB mass storage
You can download the firmware from here. You must perform the full wipe before using this ROM.