I just picked one up today. Not even thinking about tattoos being an issue because I've had Garmin smartwatches and they have been fine.
Slapped this guy on and sure enough, the heart rate monitor and stress monitor do not work.
Now I must return it.
I wouldn't there's usually a trick or 2 to get around it. I'll be picking one up just to see if I can get it to work like I did the gear s3
Did you pick one up? If so did you need a fix for the heart rate sensor? I’m wanting to change over from Apple but previous Samsung watches have failed to pick up my heart rate. Apple Watch, garmin and Fitbit all work fine for me.