YundaDeskWhatsApp’s Linked Devices rules compress into three sentences: besides the phone, one account links up to 4 companion devices at a time (web, desktop client, tablet); once linked, companions keep sending and receiving while the phone is offline; but if the phone stays disconnected past 14 days, every companion is signed out automatically. Linking happens on the phone: Settings → Linked Devices → Link a device, then scan.
What it does — and what it doesn’t
Multi-device solves one person using one number across several screens: answer on the desktop by day, on the phone in transit, with messages and chat state fully synced. The boundaries are equally clear:
- Companion devices are independent of each other — none relies on another being online;
- The phone remains the account’s anchor — moving to a new phone is a migration flow, not another QR scan;
- Some actions stay phone-only (account-level settings, payment features and the like);
- One number is still exactly one WhatsApp identity: four devices are four screens of the same “you,” with no separate names or division of labor.
Troubleshooting the usual snags
- Companions keep dropping — the phone’s battery optimizer killed WhatsApp, or the 14-day clock ran out (see the checklist in the WhatsApp Web guide)
- Need a 5th device — remove an idle one from the phone first
- Tablet or second phone shows no link option — update to a version with companion mode
- Logged in on an office computer and forgot — sign it out remotely under Linked Devices when someone leaves or changes roles; this is the most-skipped security step
What teams actually want, multi-device can’t give
Many teams researching multi-device really mean “one support number, three people taking turns.” Physically, four companion slots can hold three people; operationally, the problems start the moment they do:
Stretching multi-device into a team vs official API multi-agent
The rule of thumb matches the Web guide: multi-device is “one person, more screens” — not “one number, more people.” The proper road for the latter is Business API multi-agent on a shared number — the application walkthrough is in the WhatsApp Business API onboarding guide, and the full support setup is on the WhatsApp solution page.
To close: for personal use, spend the 4 slots wisely, remember the 14-day rule, and sign out departed devices promptly. For team use, don’t camp on companion devices — the number may be the same, but “who is accountable to this customer” is a question only the business interface can answer.