A:AnswerYes, it requires a phone, it does not go pass the setup screen when you first power it up, until you download the Samsung wear app and find device and pair with conformation of numbers on phone and watch.
A:AnswerIt can sense for a hard fall, just go into settings scroll down to safety and emergency and enable fall detection you can also send out an SOS as well, but keep in mind if you have the LTE model you don't need your phone by you to send out an SOS but if you have the GPS model SM-R910 you will need to have your phone with you and your watch paired with it to send out an SOS
A:AnswerNo it doesn't have a sensor for hydration status. You can enter your water intake throughout the day manually and then it will factor that into your other health sensor data as an overall picture of your health.
