Stand alone means it's lost connection via bluetooth with your phone.
Notifications etc won't work until it re established Bluetooth connection.
Info on LTE versions are from Samsung - gear-s3-frontier-lte.
" Gear S3 frontier (LTE) Model > SM-R765FDAAXSP "
There will be info listed on the retail box it came in and in the about device in the watches settings.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "