Sorry for the multiple threads but I can't seem to get a direct answer to this question and I really want to get an Apple Watch. I currently have a 6 running 8.2 and don't want to lose my jailbreak, but I'm told I need at least iOS 10 to be compatible with the watch. My plan is to buy an iPhone 6S and the guy at the store said he would work with me to find one w 10.2 which is the only version of iOS 10.x that has a stable Jailbreak. Now my only question is, once I have a 6S with 10.2, does it matter what version of Watch OS the watch has it will anything over iOS 10 be compatible with any Watch OS? Thanks again, I really appreciate all of the knowledgable people here.