I just unpacked and set up my Index S2 scale today and have the same problem. It only recognizes as guest and only gives weight information. Any solutions?
All-
Please see main thread for this issue:
https://forums.garmin.com/sports-fitness/healthandwellness/f/index-s2-smart-scale/245554/index-s2-does-not-recognize-me#pifragment-443=3
I had this, think it started when I changed phones. I removed the index s2 from my garmin account, reset it, and added it again and all is good.