WhatsApp Restricted Chat locks a conversation to your primary phone

WhatsApp is building a per-chat setting that keeps a conversation on a single phone. The setting, called Restricted Chat, sits in the Android beta distributed through Google Play as version 2.26.36.5, and it stops the app from syncing a chosen conversation to linked devices. Switch it on and the chat stays on the primary mobile device, out of reach of WhatsApp Web and any secondary phone signed in to the same account.