Fran, I'm 66 too.
CIC is the "head unit" (the equipment behind that display screen that shows you car settings, navigation, radio, etc in the middle of your dash, above the ventilation controls). The CIC controls your interface with the car.
First go to BT on ur phone. Settings>Bluetooth>to the item in the list for ur BMW connection. Touch the right end of entry. Takes u to a screen. Select forget the device. Confirm, and ur phone won't know the BMW anymore. Power down phone totally. Now ur phone doesn't know ur BMW but ur BMW still knows ur phone. Next step is to wipe the phone from the BMW.
Turn on car ignition. Go to CIC main menu on BMW iDrive. Pick "telephone." I don't know how your menus appear on your screen, but find a selection that corresponds to the name of your phone. Select it (push down on iDrive controller). On the center console near the gear shift is ur iDrive controller knob. Next to it is an "options" button. Push the options button. A menu will appear on screen. Select the option to remove the phone from the list. It might say "remove device" or something else. Not sure of exact language. To get to the screen to do this u might have to go through some other screen such as "manage devices." Make sure ur phone is not listed any more on the CIC menu.
Now there is a knob near ventilation controls. When u push it it either mutes or unmutes the sound. Push it in for 20 seconds or more until the screen blanks out. Release button. CIC will reboot. Now CIC has totally forgotten ur phone.
Turn on ur phone and, with car ignition on, re-pair phone with car.
I suggest u take these instruction to dealer and have service advisor do for u. He / she should be able to follow and do in under 6 minutes.