Hello, i can't find an answer to this. I'm upgrading my iPhone soon. Do i need to 'disconnect and forget' my current phone from my M3 totally before going ahead and connecting up the new iPhone? Then, is it just a case of pairing new phone via bluetooth and setting up new phone as a key? Never swapped phones before whilst driving a tesla. I appreciate this seems like a very basic question, but i can't find the answer anywhere. Lots on how to set up a brand new phone for the first time - but this is a swap.Thanks