I've been wearing the Samsung gear for 2 since March of 2018. I have used the band it came with and have always kept it looser rather than tight to account for wrist circumference changes throughout the day. A few days ago I started having severe wrist, forearm and upper arm pain. I wear the watch on my left side. Switched it to my right side. It just felt "wrong". I've used the auto hr feature if that matters. Also before the gear fit 2, I had the gear fit 1. I suspect a company that puts out exploding phones (I've had the Samsung note 7 through two recalls on Sprint, and am on the Samsung galaxy note 8 on Verizon now) isn't the safest bet. I'm a huge note fan. I believe the larger dimensions of the gear fit 2 and /or radiation from the watch are at play. All I hope is that I haven't done lasting or serious damage and that it is fixable with physical therapy. As much as I enjoy tracking my sleep, heart rate, calories, activity etc I'm not putting my watch back on because I realize my body is telling me to nope out of it and I'm going to listen.