I can’t get my new iphone 12 pro to pair with my Victron smartshunt. My iphone 7 worked flawlessly. My new phone asks for a code obtained from the smartshunt. I’ve tried entering the default PIN from the smartshunt (000000) which I’ve never changed. I’ve also seen posts indicating that I should enter the PUK code, not the PIN, but the PUK is an alphanumeric, but the iphone only lets me enter numbers, not letters and numbers. Help!!!