When you disconnet the ULf does the telephone option disappear?

Is the ULF gettting power (direct and switched) is the ULF getting an I-bus connection?

I would try disconnecting the ulf and then turning on the ignition and "resetting" (as such) the i-bus connected devices, then wait for a short while, then turn off the ign and reconnect the ULF to see is that then brings up the ULF.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.