Got an Generation 0 Apple Watch for my mom. Updated her iPhone 5S to 10.0.1 and the Watch to 3.0. When I press the side button, it bring up the Power Off and Emergency SOS screen, but holding the side button does nothing. I've held it for 10 seconds and it never starts to activate an SOS call. I did a reset to the Watch, but still no good. I'm lost.