I have a question about the Gear S2 3G version. I used to have an Apple Watch and didn't like it because I always had to have my iPhone 6 with me anywhere I went. With the Gear S2 3G version can I leave my phone at home and receive phone calls, answer phone calls, send and receive text messages, get notifications, play with certain apps, etc? What I really want to do is use Samsung Pay and be able to use Samsung Pay on the Gear S2 and leave my phone at home. Also....is there a way I can keep the same phone number on the Gear S2 as the same phone number that is associated with my cell phone?