Been using my Versa 4 for almost two years. The last month, it was nothing but problems. Then it lost communication with my phone. I tried installing the app in my work phone, and it half **ahem** worked (got the steps, the sleep, but not phone calls or messages). One of the reasons I wear a smart watch, is for the need to see who is calling, and sometimes pick up, without accessing my phone (we build stuff, and phone is not always around me). Before, I had it connected to both phones, was never a problem. Then it was just to personal phone, since I have my work phone on me at work all the time. Sunday I had it. Ordered a generic smart watch from Amazon, and, honestly, I am very happy with it. Will tey to sync my fitbit again in a couple of days, but my phone and the watch don't communicate with each other, at all. Phone can't find the watch, and app says is not compatible with the newest Android OS.
