I have an iPhone 11 Pro max and the latest Apple Watch series 6. Ive preordered the iPhone 12 pro max and it’s coming next Friday but I’ve sold my phone and I have to send it tomorrow. I know you need an iPhone to activate the Watch but once I wipe my ip11 and send it, will it make the Watch unusable? Sure I read somewhere that it has to connect to the phone every 30 days? If so will my Watch still work for a week and be able to make and take calls etc?