Overview
- WABetaInfo spotted the in‑development feature in WhatsApp for Android beta version 2.26.15.6 on Google Play, and it is not yet available to users.
- The tool is designed to notify a user’s main phone when a linked device becomes active at the same time, flagging concurrent use of the same account.
- Alerts would go only to the primary device to avoid false alarms from normal solo use on a companion device, with a toggle planned in advanced privacy settings.
- If someone leaves WhatsApp Web open on a shared computer and another person starts using it, the phone would show an alert so the owner can review sessions or sign out.
- The feature is expected after further testing in a future update, building on WhatsApp’s recent step to extend chat locks to linked devices through a secret code.