A:AnswerThe SOS feature helps you if you’re in a situation where you can’t dial for help so you active the SOS feature so it can dial help for you and it creates a sound so if there is anybody nearby they can help you
A:AnswerApple Watch Series 3 (GPS + Cellular) requires an iPhone 6 or later with iOS 11 or later. Apple Watch Series 3 (GPS) requires an iPhone 5s or later with iOS 11 or later. Apple Watch Series 1 requires an iPhone 5s or later with iOS 11 or later.
A:AnswerGos only is fine (& cheaper) as long as you always have your phone on you you can use it. But if u want to leave your phone at home I would recommend the GPS + cellular