AT&T Smart Wi-Fi
com.att.android.attsmartwifi
Finds and auto-connects to available hotspots to minimize cellular data consumption.
Auto-connects is not a good idea. You are ok if you go on HTTPS websites. Use a VPN if you want to hide the domain names you visit, avoid usage restriction (no P2P, blacklisted websites…) and encrypt HTTP traffic.
References
- https://play.google.com/store/apps/details?id=com.att.android.attsmartwifi
- https://www.europol.europa.eu/activities-services/public-awareness-and-prevention-guides/risks-of-using-public-wi-fi
- https://www.eff.org/deeplinks/2020/01/why-public-wi-fi-lot-safer-you-think
- https://thatoneprivacysite.net/choosing-the-best-vpn-for-you/