I have a iPhone XR, still on iOS 12.4.1. I picked up a Series 5 this morning from Verizon, but I haven't opened it and paired it with my phone yet. I really don't want to install iOS 13 and would rather wait until Tuesday for 13.1 because of all the bugs that I have been reading. I obviously haven't tried to pair the watch yet, as I've said, I haven't even opened the box yet, but I was just curious if I have to be on 13 for the Series 5 to pair?